Radiocarbon (Carbon-14) Dating And The Qur'ānic Manuscripts
© Islamic Awareness, All Rights Reserved.
First Composed: 21st May 2006
Last Modified: 7th April 2015
Assalamu ʿalaykum wa rahamatullahi wa barakatuhu:
Radiocarbon, or Carbon-14 dating was developed by W. F. Libby, E. C. Anderson and J. R. Arnold in 1949. This radiometric dating technique is a way of determining the age of certain archaeological artefacts of a biological origin up to about 50,000 years old. It is perhaps one of the most widely used and best known absolute dating methods and has become an indispensable part of an archaeologist's tool-kit. In 1960, Libby was awarded the Nobel Prize in chemistry for radiocarbon dating.
In this paper we would briefly discuss the principles and practice of radiocarbon dating. This will enable the reader to gain an appreciation of the advantages and disadvantages of this process. Is carbon dating applied to the Qur'anic manuscripts? Can radiocarbon dating provide more accurate results than traditional palaeographic techniques and associated methods? We will also focus on these questions in the final section of our discussion.
2. Principles And Practice
Carbon has two stable, nonradioactive isotopes: carbon-12 (12C), and carbon-13 (13C). In addition, there are tiny amounts of the unstable radioactive isotope carbon-14 (14C) on Earth. These isotopes are present in the following amounts 12C - 98.89 %, 13C - 1.11 % and 14C - 0.00000000010 %. In other words, one carbon 14 atom exists in nature for every 1,000,000,000,000 12C atoms in a living being.
ORIGIN OF CARBON-14
When cosmic rays enter the earth's atmosphere, they undergo various interactions with gas molecules which results in the production of fast moving neutrons. These energetic neutrons dissociate a nitrogen molecule into atoms and then reacts with these atoms to form 14C. The reaction can be written as:
n + 14N 14C + p
where n is a neutron and p is a proton.
The highest rate of 14C production takes place at stratospheric altitudes of 9 to 15 km. Unlike the commonly available carbon, 12C, 14C is unstable and slowly decays, changing it back to nitrogen and releasing energy. This instability makes it radioactive.
ASSIMILATION OF CARBON-14 IN THE EARTH'S BIOSPHERE
The 14C isotope is brought to the earth by atmospheric activities (such as storms) and becomes fixed in the biosphere. Since 14C reacts just like 12C and 13C isotopes of carbon, it becomes part of a plant through photosynthesis reactions. Animals eating these plants in turn absorb 14C as well as the stable isotopes (i.e., 12C and 13C). This process of ingesting 14C continues as long as the plant or animal remains alive. Because 14C is so well mixed up with 12C, the ratio between 14C and 12C is the same in a leaf from a tree, or a part of an animal body. 14C also enters the Earth's oceans in an atmospheric exchange and as dissolved carbonate. The entire 14C inventory is termed the carbon exchange reservoir.
DEATH, DECAY & DATING
As soon as a plant or animal dies, the metabolic function of carbon uptake is ceased. There is no replenishment of radioactive 14C and the amount of 14C gradually decreases through radioactive decay as given by the following equation.
14C 14N + β
After the emission of β, i.e., a beta particle, 14C is changed into stable and non-radioactive nitrogen, 14N. In other words, the 14C/12C ratio gets smaller and smaller over time. So, we have something like a "clock" which starts ticking the moment a living being dies. Thus the radiocarbon dating method can, in principle, be uniformly applied throughout the world.
Libby, Anderson and Arnold were the first to measure the rate of this decay and found that the half life of 14C was 5568 years, i.e., in 5568 years half the 14C in the original sample will have decayed. After another 5568 years, half of that remaining material will have decayed, and so on. A 14C half-life of 5568 ± 30 years is known as the Libby half-life. Later measurements of the Libby half-life indicated the figure was approximately 3% lower; a more accurate half-life was 5730 ± 40 years. This value is known as the Cambridge half-life.
After 10 half-lives, there is a small amount of radioactive carbon left in a sample. In about 50,000-60,000 years, therefore, the limit of this technique is reached. It must be emphasised that the 14C decay is constant and spontaneous. In other words, the probability of decay for an atom of 14C in a sample is constant, thus making it amenable to the application of statistical methods for the analysis of counting data.
LIMITATIONS OF RADIOCARBON DATING
No technique is perfect and radiocarbon dating is no exception. Although with this technique almost any sample of organic material can be directly dated, there are a number of limitations which makes the technique imperfect. The theory discussed below is summarized from here.
MATHEMATICS, MEASUREMENT AND CALIBRATION
The radioactive decay of 14C follows what is called an exponential decay. Here the amount of 14C decreases at a rate proportional to its value. Mathematically, it can be expressed in the form of a differential equation, where N is the quantity of 14C and l is called the decay constant.
Solving this differential equation gives the standard form of the decay equation:
N0 = number of radiocarbon atoms at time t = 0, i.e., the origin of the disintegration time right after the death of plant or animal,
N = number of radiocarbon atoms remaining after radioactive decay during the time t,
l = radiocarbon decay constant.
Perhaps the most famous of all the radiocarbon measurement techniques is the Accelerator Mass Spectrometry (AMS). Just like other mass spectrometry studies, AMS is performed by converting the atoms in the sample into a beam of fast moving ions. The sample is first ionised by bombarding it with caesium ions and then focused into a fast-moving beam. The ions then enter the accelerator. The accelerator is used to help remove ions that might be confused with 14C ions before the final detection. The ions are filtered and finally the 14C ions enter the detector where they can be counted. In AMS, the radiocarbon atoms are directly detected instead of waiting for them to decay as in Gas Proportional Counting (GPC) or Liquid Scintillation Spectrometry (LSS). Therefore, the sample sizes are typically very small, generally in the order of a few milligrams.
Raw radiocarbon measurements are usually reported in years Before Present or BP. Before Present (BP) years are the units of time, counted backwards to the past, used to report raw radiocarbon ages and dates referenced to the BP scale origin in the year 1950 CE. There are two reasons as to why 1950 CE was established as the origin year for the BP scale. Firstly, in this year the calibration curves for carbon-14 dating were established and secondly, the year 1950 predates atmospheric testing of nuclear weapons, which altered the global balance of 14C to 12C (Atom Bomb Effect).
The radiocarbon measurements reported in terms of BP years is directly based on the proportion of radiocarbon found in the sample. Its calculation is based on the assumption that the atmospheric radiocarbon concentration has always been the same as it was in 1950. As we have noted earlier, this is not true. The 14C to 12C ratio varied by a few percent over time. Hence this requires a need of calibration. Calibration of radiocarbon determinations is, in principle, very simple. The radiocarbon measurement of a sample is compared with a tree ring with the same proportion of radiocarbon. Since the calendar age of the tree rings is known, this gives the age of the sample. In practice, there are limitations. The measurements on both the sample and the tree rings have a limited precision. This will give rise to a range of possible calendar years. Furthermore, since the atmospheric radiocarbon concentration has varied in the past, there might be several possible ranges. In order to understanding how radiocarbon dating works in practice, let us study a few examples from the Qur'anic manuscripts.
3. Carbon-14 Dating Of Qur'anic Manuscripts
Radiocarbon dating of Qur'anic manuscripts is very rare, though this is beginning to change. With the advent of the Corpus Coranicum project, carbon dating has been given pride of place with a specially named module Computatio Radiocarbonica. The aim here is to supplement traditional methods for dating the earliest Qur'anic manuscripts with modern scientific methods. Being well served by historians, is Qur'anic studies really in need of carbon dating? After all there are some major drawbacks to this method - it is very expensive and destructive. Other serious issues include the wide range of calendar years in which a manuscript could have been written. Scholars have successfully utilised "traditional" dating methods such as palaeography, codicology and art history that utilise script, format, ornamentation and illumination which are then compared, where possible, with their dated counterparts in architecture. In short, why bother?
Being a modern invention, some historians have become unduly skeptical in embracing carbon dating. For example, François Déroche, one of the leading western specialists in the field of Qur'anic manuscripts, initially strikes a positive tone. Carbon dating, he says, “should not be neglected”, though the results of such analysis should be, “taken with caution”. Carbon dating, “helped answering the problem of dating early copies”, but, he warns, there are “limitations of this technique”. Déroche then uses two case studies which he thinks highlights the problems and limitations of this method. Two Qur'ans, both with endowment notices, were carbon dated by a French laboratory and provided a range of dates that preceded the date given in the endowment notices by around 50 and 100 years, respectively. One is thus left with the overall impression that carbon dating, at least when applied in Qur'anic studies, produces unexpectedly early dates and is therefore inaccurate.
With the above information fresh in the readers mind (namely carbon dating produces unexpectedly early results in Qur'an studies and is not reliable), next Déroche moves straight into the carbon dating of Ṣanʿāʾ I and attempts to establish a scientific principle. Commenting on the unexpectedly early dates assigned to samples from this manuscript by a (same?) French laboratory, he says, “Here the problem may lie with the conditions (arid or semi-arid climate) under which the cattle, the hides of which were later turned into parchment, was raised”. Thus, according to his view, the arid or semi-arid climate in which the parchment for Qur'anic manuscripts were produced does not lend itself to carbon dating. In one fell swoop, Déroche seems to exempt Qur'anic studies from this dating method without providing any scientific evidence! One will search in vain - there is no scientific basis for his view. It is well-known amongst scientists that carbon dating has been extensively tested and successfully applied throughout a variety of disciplines within and out-with such climates - there is no sound scientific basis for claiming otherwise.
There is an important methodological principle to be observed here. Just as one would not discount the field of palaeography / codicology when a practitioner provides incorrect information, one can likewise not discount the method of carbon dating when one of its practitioners (i.e., laboratories) produces incorrect information. For example, Déroche reveals he did not realise Ms. Arabe 328a and Ms. Arabe 328b were from the same manuscript and described them separately in his catalogue of the Bibliothèque Nationale de France. With the benefit of further examination and additional evidence, he has since revised his views and now considers them as emanating from the same manuscript. It would be sheer folly to discount the field of palaeography / codicology, highlighting an incorrect piece of information given by one of its most talented members, who initially did not link these manuscripts together. Even more foolhardy would be using this result to impugn the results of other palaeographers / codicologists working on other manuscripts. One must be very careful not to make assumptions and generalisations on the basis of a few tests. As described in the previous section, sample pretreatment is absolutely critical if one wants to obtain the most accurate measurements. Just as one would seek out the most talented palaeographers to date a script, one should also seek out the most competent laboratories to carbon date parchment manuscripts. The dates given by Déroche could well be the result of faulty handling / preparation either by the laboratory where the sample was processed, and/or by the persons involved in the collection of the sample.
Who then should have the final say in matters relating to dating? According to Déroche, “the last word should stay with the philologist, the historian or the palaeographer”. This begs the question: should scholars involved in dating the earliest Qur'anic manuscripts rely on a single specialism? It may seem what is at stake here is the historian's craft. Spending decades honing skills learnt from masters in the field, it is only natural to encounter some pushback against a recently developed detached scientific method, especially when it appears to undermine commonly accepted historical paradigms. However, there need not be any confrontation. The historian's toolbox should be expansive and willing to encompass any techniques which have been proven useful, even though the technique may be unfamiliar, or the underlying process not entirely understood. One of the great benefits and advantages of carbon dating is that scholarly prejudice and pre-suppositions about the genesis of Arabic scripts and Qur'anic manuscripts are not factored into the calculation. It cannot, however, be seen as disadvantageous or faulty when it appears to clash with one's own chronological reconstruction. A collaborative approach that makes full use of scientific tests whilst remaining anchored in time tested traditional historical methods is more likely to provide the most fruitful results.
It should be highlighted that when conducting radiocarbon analysis, almost any date within the specified range generated by the confidence level is equally possible scientifically. It is not the case that the range can be averaged to find the most probable date. Thus, given the wide range of calendar years, radiocarbon dating rarely provides unexpected information to an experienced palaeographer / codicologist; however this is not always the case as we will see next.
A QUR'ANIC CODEX FROM ST. PETERSBURG, KATTA LANGAR, BUKHĀRĀ AND TASHKENT
Figure 1: A folio from the "Qur'an of ʿUthmān" (Manuscript E20) at the Institute of Oriental Studies, St. Petersburg, Russia showing the last part of Surah al-Sāffat (verses 158-182) and beginning of Surah Sād (verses 1-8).
The E20 manuscript, housed in the St. Petersburg branch of the Institute of Oriental Studies, comes from Uzbekistan (Figure 1). A detailed history of this manuscript was published by Efim Rezvan in 2000. In the same year, he also published a radiocarbon dating of this manuscript, the results of which are depicted in Figure 2.
Figure 2: (a) The radiocarbon concentration in the sample, calibration using the tree rings and depiction of possible ages of the sample in the form of a history (see text below). (b) A histogram showing the possible ages of the E 20 manuscript.
The main elements of Figure 2(a) are as follows:
In the case of this manuscript the radiocarbon result is 1150 ± 50 BP. This indicates that the age is 1150 BP with a standard uncertainty of ±50 years. The age of 1150 BP is calculated using the simplistic assumption that the amount of radiocarbon in the atmosphere has always been the same. This is not quite the case except that it is a rough indication of the age. Hence the measurement must be calibrated against samples of known ages, for example, the tree rings. The radiocarbon data and the calibration curve are used to plot the probability distribution of the age of the manuscript.
In the case of the E 20 manuscript from St. Petersburg, the 68.3% confidence level (1σ) yields the ranges, 781–791 CE, 825–843 CE, 859–903 CE and 915–977 CE. The 95.4 % confidence level (2σ) yields 775–995 CE. A palaeographic analysis of this manuscript proposed a date around the final quarter of the 8th century CE. This dating was also agreed by François Déroche. However, Alain George believes this to be an instance where the radiocarbon dating does not closely match the features of the manuscript. Commenting on the script and decoration, he suggests a date nearer the turn of the 1st century AH (late 7th, early 8th century CE).
THE AL-WALĪD MANUSCRIPT FROM ṢANʿĀʾ, YEMEN (INV. NO. 20-33.1)
This is perhaps one of the most well-studied Qur'anic manuscripts and comes from Dār al-Makhṭūtāt, Ṣanʿāʾ, Yemen. Hans-Caspar Graf von Bothmer from the University of Saarland, Germany, studied this manuscript in great detail from the point of view of script, ornamentation and illumination. It is one of the earliest known and firmly dated manuscript from the late 1st century of hijra written in the kufic script. This monumental Qur'anic manuscript originally had dimensions around 51 cm in length by 47 cm in width (Figure 3). Its origin appears to be from Syria.
Figure 3: A folio of the "Great Umayyad Qur'an" from Ṣanʿāʾ, (Yemen).
Using palaeography, ornamentation and illumination of this manuscript, von Bothmer dated it to the last decade of the 1st century of hijra, around 710–715 CE, in the reign of the Umayyad caliph al-Walīd. However, the radiocarbon dating of this manuscript suggests a date between 657 and 690 CE. An unpublished chemical test suggested a similar range of dates around 700-730 CE. Again he confirms the dating of this manuscript elsewhere by pointing out that:
Certain features of the manuscript and the iconography intimate that this work was made for a member of the Umayyad family; historical circumstances suggest that caliph al-Walid himself may have commissioned it. However, the carbon dating points to a slightly earlier date.
Here it is interesting to note that both the palaeographic considerations and radiocarbon dating have arrived at nearly the same conclusion, i.e., this manuscript dates to the last part of the 1st century of hijra. However, as von Bothmer has noted, the radiocarbon dating gives a slightly earlier date. This could be due to the fact that the radiocarbon dating gives the death of animal and not when the manuscript was actually written.
The interesting thing to note about this Qur'an from al-Walīd's time is its uncanny resemblance to a number of large Qur'anic manuscripts typified as "Group 2" by Estelle Whelan. The most famous of them is the Chester Beatty 1404. The Chester Beatty 1404 manuscript has very similar features that are reminiscent of the Umayyad period. Moritz published details of the twenty ornamented pages. This manuscript was dated to 1st century of hijra by A. S. Yahuda. Moritz, in the legends to his photographs, dated it to the 2nd / 3rd century hijra. On the other hand, Josef von Karabacek dated it to the 3rd century. However, now a firm dating of a Qur'an belonging to "Group 2" from al-Walīd's time suggests that the Chester Beatty 1404 manuscript also dates from similar period, i.e., either late first century or early second century of hijra. Furthermore, this also lends support to the early dating of the numerous primitive ḥijāzī manuscripts.
A MONUMENTAL QUR'ĀNIC MANUSCRIPT IN TASHKENT ATTRIBUTED TO CALIPH ʿUTHMĀN
Approximately one third of the Qur'an from which this massive folio originates - “the ʿUthmān Qur'an” - is housed in Tashkent, Uzbekistan (Figure 4). Late in the 19th century the manuscript was in St. Petersburg, Russia, where it was studied by the Russian orientalist A. N. Shebunin. He gave a detailed account of the codex and examined the peculiarities of its orthography. So great was the interest in this codex that in 1905 Pisarev (or Pissareff) was encouraged to publish a facsimile edition. It would appear that during this period in St. Petersberg, a number of folios were separated from this manuscript and over the years a number of folios have appeared under the hammer at auction or have been sold privately between collectors.
Figure 4: A folio from a massive Qur'an attributed to caliph ʿUthmān. It was found in North Africa.
This is a massive Qur'anic manuscript on vellum showing a well-formed kufic script without diacritical marks and ornamentation. The verse endings are marked by small panels of diagonals lines; the tenth verse is marked with a square medallion illuminated in blue, green, red and manganese with a stellar design. Shebunin dated this manuscript to the early second century hijra. On the basis of the orthography as observed in the 1905 facsimile edition prepared by S. I. Pisarev, Jeffery dated it to the early ninth century. More recently, Déroche had assigned a date to the second half of the eighth century, more specifically, under the patronage of the third Abbasid caliph Al-Mahdi (reigned 158 - 169 AH / 775 - 785 CE). The carbon-dating of a folio from this manuscript was carried out at Oxford. The result showed a 68% probability of a date between 640 CE and 765 CE, and a 95% probability of a date between 595 CE and 855 CE. Commenting on this result, Rezvan noted that the palaeographic dating of this manuscript also indicated a date at the turn of the eight / ninth century CE.
AN ‘UMAYYAD’ FRAGMENT OF THE QUR'ĀN
This privately-owned fragment of the Qur'an was published recently by Yasin Dutton [Figure 5(a)]. On the basis of palaeography and radiocarbon analysis, he dated it to the second half of the 1st century of hijra / late 7th or early 8th century CE.
Side B (detail)
Figure 5: (a) The 'Umayyad' fragment and (b) its radiocarbon dating.
The radiocarbon dating of the fragment was carried out at the University of Oxford [Figure 5(b)]. Two calibration data-sets, viz., INTCAL98 and INTCAL04, were used. The results are as follows.
Results with INTCAL98 calibration data-set: The radiocarbon age of 1363 ± 33 BP yielded a 68.2% probability that the parchment in question dates to between 647 and 685 CE (i.e., 26–66 AH), a 95.4% probability that it dates to between 610 and 770 CE (i.e., twelve years before the hijra to 153 AH), with that range being broken down into a 90.5% probability that it dates to between 610 and 720 CE (i.e., twelve years before the hijra to 102 AH) and a 4.9% probability that it dates to between 740 and 770 CE (i.e., 122–53 AH). This suggests, as the report from the University of Oxford Radiocarbon Acceleration Unit put it, that ‘it is most likely that the parchment was made between AD 610 and AD 720’, that is, broadly speaking, from some time within the first century of the hijra.
Results with INTCAL04 calibration data-set: Since the time of this test in 2001, a newer calibration data-set, INTCAL04, has yielded slightly narrower results for the same radiocarbon age (i.e., 1363 ± 33 BP), namely, a 68.3% probability that the parchment dates from 644–75 CE (i.e. 25–56 AH), and a 95.2% probability that it dates from either 609–94 CE (i.e., thirteen years before the hijra to 75 AH) (95.2%), or 702–6 CE (i.e., 83–7 AH) (0.006%), or 748–65 CE (i.e., 131–48 AH) (0.042%). It would therefore seem acceptable to revise the afore-mentioned estimate to read ‘it is most likely that the parchment was made between AD 609 and AD 694’, and therefore used for its present purpose some time in the first 75 years of the first century AH.
It is interesting to note that the results here lie within a rather narrow range of dates for the 95% probability level – 160 years for the INTCAL98 result, and 156 years for the INTCAL04 result. On the other hand, we have seen that the radiocarbon dating of the so-called ʿUthmānic codex from Tashkent yielded a wide 260 year range (595–855 CE) at the 95% probability level. Likewise, the test on E20 Qur'anic manuscript in St. Petersburg yielded a 220 year range (775–995 CE). In these two cases, neither of them help very much in establishing a narrow and possibly accurate date for these particular manuscripts.
This fragment is remarkably similar to two other published folios and it has been concluded that they all come from the same codex. The first folio MS 678 in the Iraq Museum in Baghdad, published by Ṣalāḥ al-Dīn al-Munajjid. The second folio comes from the collection of the Hartford Seminary, Connecticut (USA), which was put for auction by Sotheby's in 2004. It was also illustrated in a catalogue prepared by Sam Fogg to accompany an exhibition of Islamic calligraphy held at the Museum für Islamische Kunst, Berlin, in 2006. The main part of this codex is kept in Istanbul, Turkey, comprising 122 folios being Ms. TIEM 51 & 53.
SOTHEBY'S 1993 / STANFORD 2007 - A PALIMPSEST MANUSCRIPT OF THE QUR'ĀN
A folio originally belonging to Codex Ṣanʿāʾ 1 was auctioned by Sotheby's (London) in the year 1993 (Lot 31) [Figure 6(a)]. Recently, radiocarbon dating was performed on this folio and the analysis was done at the Accelerator Mass Spectrometry (AMS) Laboratory at the University of Arizona. According to Sadeghi and Bergmann, the results indicate that the parchment has a 68% (1σ) probability of belonging to the period between 614 CE to 656 CE. It has a 95% (2σ) probability of belonging to the period between 578 CE and 669 CE [Figure 6(b)]. The carbon dating is applicable to the scriptio inferior text. The date which the scriptio superior text was written could be the first or second half of the 7th century or even the early 8th century (more generally the 1st century hijra).
Sotheby's 1993 / Stanford 2007, recto
Sotheby's 1993 / Stanford 2007, verso
Figure 6: (a) Sotheby's 1993 / Standford 2007 palimpsest folio and (b) its radiocarbon dating result.
Sadeghi highlights, “For historical reasons, however, what is of greater interest is the probability that the parchment is older than a certain date. … The probability that the parchment is older than AD 646 is 75.1%, or a three-to-one likelihood. It is highly probable therefore, that the Ṣanʿāʾ I manuscript was produced no more than 15 years after the death of the Prophet Muḥammad.” He concluded that the scriptio inferior text belonged to the period of the companions of Prophet Muḥammad, whilst the scriptio superior text belonged to the ʿUthmānic tradition, and using stemmatics, the ʿUthmānic tradition was shown to give the most accurate reproduction of the Prophetic prototype.
M a VI 165 - A ḤIJĀZĪ MANUSCRIPT OF THE QUR'ĀN AT TÜBINGEN
Figure 7: Folios (a) 1 recto and (b) 24 recto of Ms. M a VI 165 at the Universitätsbibliothek Tübingen, Germany.
Whilst serving in his position as first Prussian Consul to Damascus in the middle of the 19th century, Johann Gottfried Wetzstein made numerous acquisitions of ancient Arabic manuscripts, many of which belonged to the Qur'an. Wetzstein's acquisitions ended up in several collections across Germany, with this particular ḥijāzī manuscript now kept at the Universitätsbibliothek Tübingen, Germany. In his foreword to a small catalogue he published, Wetzstein said he hoped these more than 1,100 kufic folios of the Qur'an he had collected would be of some interest to those involved in palaeography and Qur'anic criticism, and gave a brief entry for M a VI 165. Weisweiler was the first person to give a brief description of this manuscript in his handlist of manuscripts at the Universitätsbibliothek Tübingen, Germany. Alba Fedeli cautiously attributed this manuscript to the 8th century CE and commented upon some of its variants. It has now been subject to radiocarbon analysis under the auspices of the Corpus Coranicum project and has been dated to 649-675 CE with 95.4% probability.
A ḤIJĀZĪ MANUSCRIPT OF THE QUR'ĀN AT STAATSBIBLIOTHEK (BERLIN) & DĀR AL-KUTUB AL-MIṢRIYYA (CAIRO)
Ms. Qāf 47, Folio 15b
Ms. Or. Fol. 4313, Folio 21a
Figure 8: Folios of Ms. Qāf 47 and Ms. Or. Fol. 4313.
Ms. Qāf 47 and Ms. Or. Fol. 4313 belong to the same codex and are located at Dār al-Kutub al-Misriyya, Cairo, and Staatsbibliothek zu Berlin, Germany, respectively. Palaeographically, this ḥijāzī manuscript is dated to 1st century AH. This manuscript was subject to radiocarbon analysis under the auspices of the Corpus Coranicum project and has been dated to 606-652 CE with 95% probability.
A ḤIJĀZĪ MANUSCRIPT OF THE QUR'ĀN AT LEIDEN
Figure 9: Folios of (a) Leiden Or. 14.545b recto and (b) Leiden Or. 14.545c recto at the University Library, Leiden, the Netherlands.
Ms. Leiden Or. 14.545b and Leiden Or. 14.545c belong to the same manuscript as Arabe 331 that is located in the Bibliothèque Nationale, Paris. They were purchased by the University Library of Leiden in 1979 from H. C. Jorissen, the former Dutch Ambassador to Beirut. Originally believed to date from the latter part of the 8th century, this manuscript has now been subject to radiocarbon analysis under the auspices of the Corpus Coranicum project and has been dated to 652-763 CE with 95.4% probability, with that range being broken down into a 89.3% probability that it dates to between 652 and 694 CE and a 6.1% probability that it dates to between 747 and 763 CE.
MS. LEIDEN OR. 8264 - MANUSCRIPT OF THE QUR'ĀN WRITTEN ON PAPYRUS
Figure 10: The recto side of folio of manuscript Leiden Or. 8264 at the University Library, Leiden, the Netherlands.
This manuscript was privately acquired by C. van Arendonk (d. 1946) from Erik van Scherling, an antiquarian in Oegstgeest, who, in turn, may have brought the papyrus from Egypt. Van Arendonk was a curator of the Leiden Oriental collections. The papyrus comes apparently from a collection, either private or public, as there is a label pasted on the glass with the mark ‘A1’. Qur'ans written on papyrus are quite rare. This is because papyrus, unlike parchment, is not as durable a material for everyday use. Due to their fragile nature combined with regular use of the Qur'an, these manuscripts may not have survived. The recent radiocarbon dating of this papyrus under the auspices of the Corpus Coranicum project gave a date range of 646-770 CE with 99.7% probability. Noseda, who published this manuscript, noting some of its archaic features coming from 1st and 2nd centuries of hijra, strangely dated the folio to 3rd century AH / 9th century CE.
4. Discussion & Conclusions
Our discussion points to the fact that the palaeographic and the radiocarbon datings sometimes nearly match each other. In fact, similar conclusions have been reached for the Dead Sea Scrolls using radiocarbon and palaeographic datings. Various fragments of the Dead Sea Scrolls were radiocarbon dated in 1991 and more recently in 1995. Comparing the palaeographic and radiocarbon dating of the scrolls, the study published in 1991 concluded that:
Our research put to test both the radiocarbon method and palaeography; seemingly, both disciplines have fared well.
Similar conclusions were also reached by the 1995 study. It says:
Ages determined from 14C measurements on the remainder of the Dead Sea Scroll samples are in reasonable agreement with palaeographic estimates of such ages, in the cases where those estimates are available.
It must be borne in mind that the conclusions of these two studies are based on the confidence level of 1σ (or 68%). In other words, in 68% of the cases the date will be within a particular range. If the range is increased from 1σ to 2σ, the percentage can be increased from 68% to 95%. Consequently, it will also effect the overall agreement between radiocarbon and palaeographic datings.
The radiocarbon dating of Qur'anic manuscripts in the literature is rare as this technique is not only very expensive and destructive but also provides a wide range of calendar years in which a particular manuscript could have been written. Just as no technique is perfect, radiocarbon dating is no exception. There are a number of factors that can affect the accuracy of the result, including sample type, sample size, sample handling / preparation and the 14C to 12C ratio (calibration data).
It is interesting to note that the palaeographic and the radiocarbon datings sometimes nearly match each other. Radiocarbon dating can't replace the traditional time-tested method of palaeography. Radiocarbon method can only supplement, and at times complement, the "traditional" palaeography and is gaining prominence in dating. A few years ago, von Bothmer pointed out that the radiocarbon dating is not only expensive but also has the results scattered over a time period, sometimes spanning a few hundred years. He suggested that the "traditional" methods of Arabic palaeography are more precise and offer a smaller range for dating the Qur'anic manuscripts. Whilst proposing a new data-base method for collating, schematising and dating early Qur'anic manuscripts, Efim Rezvan laments at the methodological stagnation in accurately dating early Qur'anic manuscripts. With regard to modern-physical methods such as radiocarbon dating, he states:
Modern physical methods make it possible to date various kinds of written materials with an margin of error of 100-200 years either way. Hence, we cannot rely on these methods. It is our hope that the analysis of a great number of manuscripts using the data-base will enable us to find some new grounds for dating.
Similar conclusions have also been reached by Gerd-R. Puin who states:
Because determining the age of the parchment itself by scientific methods is still very inaccurate - the margin of error being ± 100 - 200 years! - an art historical approach, in this case, seems to be more suitable.
Even more recently, one should take heed of Blair's insistence on utilising a more comprehensive approach than is currently the case, insisting that the adoption of multi-disciplinary sophistication will help to solve the disputes on dating early Qur'anic manuscripts.
And Allah knows best!
References & Notes
 W. F. Libby, E. C. Anderson & J. R. Arnold, "Age Determination By Radiocarbon Content: World-Wide Assay Of Natural Radiocarbons", Science, 1949, Volume 109, pp. 227-228; J. R. Arnold & W. F. Libby, "Age Determination By Radiocarbon Content: Checks With Samples Of Known Age", Science, 1949, Volume 110, pp. 678-680.
 R. E. Taylor, Radiocarbon Dating: An Archaeological Perspective, 1987, Academic Press, Inc.: Orlando (FL), pp. 169-170. The text of the 1960 Nobel Prize in Chemistry awarded to Williard F. Libby for development of the 14C dating technique is given on p. 170.
 ibid., p. 6.
 ibid., pp. 7-9.
 ibid., p. 9.
 ibid., p. 9.
 ibid., pp. 16-34.
 H. E. Suess, "Radiocarbon Concentration In Modern Wood", Science, 1955, Volume 122, pp. 415-417.
 R. E. Taylor, Radiocarbon Dating: An Archaeological Perspective, 1987, op. cit., p. 98.
 ibid., pp. 90-95.
 ibid., pp. 86-90.
 M. Stuiver & H. A. Polach, "Discussion: Reporting Of 14C Data", Radiocarbon, 1977, Volume 19, No. 3, pp. 355-363.
 H. de Vries, "Atomic Bomb Effect: Variation Of Radiocarbon In Plants, Shells, And Snails In The Past 4 Years", Science, 1958, Volume 128, pp. 250-251; Also see R. E. Taylor, Radiocarbon Dating: An Archaeological Perspective, 1987, op. cit., pp. 37-38.
 F. Déroche, Qurʾans Of The Umayyads: A First Overview, 2014, Koninklijke Brill nv: Leiden (The Netherlands), pp. 11-12.
 ibid., pp. 12-13.
 Déroche does give an example of three manuscripts that were carbon dated that produced results in line with their palaeographical attribution [ibid., p. 13], but this is merely to confirm the palaeographical attribution - not in the sense the carbon dating method has been validated. Elsewhere Déroche mentions that Ms. R 38 has been carbon dated with 95.6% probability to 648-691 CE and that a folio originally belonging to TIEM 51 & 53 with 95.2% probability to 609-694 CE. These results do not fit Déroche's chronological reconstruction and he says the "real" (opposed to fake?) date of these manuscripts is some 50 years later [ibid., p. 125, p. 128].
 ibid., p. 13.
 F. Déroche, "The Codex Parisino-Petropolitanus And The Ḥijāzī Scripts", in M. C. A. MacDonald (Ed.), The Development Of Arabic As A Written Language: Papers From The Special Session Of The Seminar For Arabian Studies Held On 24th July 2009, 2010, Supplement To The Proceedings Of The Seminar For Arabian Studies - Volume 40, Archaeopress: Oxford, pp. 113-114.
 F. Brock, "Radiocarbon Dating of Historical Parchments", Radiocarbon, 2013, Volume 55, Numbers 2-3, pp. 353-363.
 F. Déroche, Qurʾans Of The Umayyads: A First Overview, 2014, op. cit., p. 13.
 M. van Strydonck, A. de Moor, D. Bénazeth, "14C Dating Compared To Art Historical Dating Of Roman And Coptic Textiles From Egypt", Radiocarbon, 2004, Volume 46, Number 1, p. 243.
 This point has been made succinctly by Sheila Blair, who also provides a neat summary of the benefits and pitfalls that can be encountered during the carbon dating process. See, S. S. Blair, Islamic Calligraphy, 2006, Edinburgh University Press: Edinburgh (Scotland), pp. 124-125, p. 128.
 E. A. Rezvan, "Yet Another Uthmanic Qur'an (On The History Of Manuscript E 20 From The St. Petersburg Branch Of The Institute Of Oriental Studies", Manuscripta Orientalia, 2000, Volume 6, No. 1, pp. 49-68.
 E. A. Rezvan, "On The Dating Of An Uthmanic Qur'an From St. Petersburg", Manuscripta Orientalia, 2000, Volume 6, No. 3, pp. 19-22.
 ibid., pp. 20 and 21.
 E. A. Rezvan, "The Qur'an And Its World VI. Emergence Of A Canon: The Struggle For Uniformity", Manuscripta Orientalia, 1998, Volume 4, No. 2, p. 26.
 F. Déroche, "Note Sur Les Fragments Coraniques Anciens De Katta Langar (Ouzbékistan)", Cahiers D'Asie Centrale, 1999, Volume 7, p. 70.
 A. George, "Calligraphy, Colour And Light In The Blue Qur’an", Journal Of Qur'anic Studies, 2010, Volume 11, No. 1, p. 88.
 H-C. G. von Bothmer, "Masterworks Of Islamic Book Art: Koranic Calligraphy And Illumination In The Manuscripts Found In The Great Mosque In Sanaa", in W. Daum (Ed.), Yemen: 3000 Years Of Art And Civilization In Arabia Felix, 1987?, Pinguin-Verlag (Innsbruck) and Umschau-Verlag (Frankfurt/Main), pp. 180-181; idem., "Architekturbilder Im Koran Eine Prachthandschrift Der Umayyadenzeit Aus Dem Yemen", Pantheon, 1987, Volume 45, pp. 4-20; M. B. Piotrovsky & J. Vrieze (Eds.), Art Of Islam: Heavenly Art And Earthly Beauty, 1999, De Nieuwe Kerk: Amsterdam & Lund Humphries Publishers, pp. 101-104; H-C. G. von Bothmer, K-H. Ohlig & G-R. Puin, "Neue Wege Der Koranforschung", Magazin Forschung (Universität des Saarlandes), 1999, No. 1, p. 45.
Also published in Maṣāḥif Ṣanʿāʾ, 1985, Dar al-Athar al-Islamiyyah: Kuwait, p. 45.
 Memory Of The World: Ṣanʿāʾ Manuscripts, CD-ROM Presentation, UNESCO.
 H-C. G. von Bothmer, K-H. Ohlig & G-R. Puin, "Neue Wege Der Koranforschung", Magazin Forschung (Universität des Saarlandes), 1999, op. cit., p. 45. Hans-Casper Graf von Bothmer says:
Gestützt auf architektur- und ornamentgeschichtliche Argumente, zu denen u.a. kodikologische und paläographische Überlegungen kamen, habe ich diese Handschrift in das letzte Jahrzehnt des ersten Jahrhunderts H. - etwa in die Jahre 710-15 n.Chr. - ans Ende der Regierungszeit al-Walids datiert. Eine später, und ohne Kenntnis meiner Datierung durchgeführte naturwissenschaftliche Untersuchung nach der C14-Methode hat nach dem noch unveröffentlichten Untersuchungsbericht, als kalibriertes Ergebnis einen Entstehungszeitraum "zwischen 657 und 690", be stimmt. Ist damit die Datierung mittels kunsthistorischer Methoden in Frage gestellt? Ich denke nicht.
Noting that the E20 Manuscript and the Samarqand Manuscript produce a range of 220 years and 260 years respectively at the 95% confidence level, Sheila Blair is suspicious of the low range reported by von Bothmer, noting it is only 33 years in length. Furthermore, she complains that the testing facility and standard deviations (confidence levels) are absent. See S. S. Blair, Islamic Calligraphy, 2006, Edinburgh University Press Ltd: Edinburgh (Scotland), p. 125 and p. 139, footnote 95. Hans-Casper von Bothmer is currently preparing a voluminous tome on the Ṣanʿāʾ manuscripts. Any judgements as to the soundness and completeness of the results reported above should be resolved by the publication of this volume.
 A. George, The Rise Of Islamic Calligraphy, 2010, Saqi Books: London, p. 79.
 M. B. Piotrovsky & J. Vrieze (Eds.), Art Of Islam: Heavenly Art And Earthly Beauty, 1999, op. cit., p. 101.
 E. Whelan, "Writing the Word of God: Some Early Qur'an Manuscripts And Their Milieux, Part I", Ars Orientalis, 1990, Volume 20, pp. 119-121 for the discussion on "Group 2" manuscripts and Figs. 19-22 on pp. 146-147.
 B. Moritz (Ed.), Arabic Palaeography: A Collection Of Arabic Texts From The First Century Of The Hidjra Till The Year 1000, 1905, Publications of the Khedivial Library, No. 16, Cairo, See Pls. 19-30.
 E. Whelan, "Writing the Word of God: Some Early Qur'an Manuscripts And Their Milieux, Part I", Ars Orientalis, 1990, op. cit., p. 120.
 B. Moritz (Ed.), Arabic Palaeography: A Collection Of Arabic Texts From The First Century Of The Hidjra Till The Year 1000, 1905, op. cit., see the legends of Pls. 19-30.
 J. von Karabacek, "Arabic Palaeography", Vienna Oriental Journal (Wiener Zeitschrift Für Die Kunde Des Morgenlandes), 1906, Volume 20, p. 136.
 A. Shebunin, "Kuficheskii Koran Imp. SPB. Publichnoi Biblioteki", Zapiski Vostochnago Otdieleniia Imperatorskago Russkago Arkheologicheskago Obshchestva, 1891, op. cit., pp. 69-133.
 S. Pissareff, Coran Coufique de Samarcand: écrit d'après la Tradition de la Propre Main du Troisième Calife Osman (644-656) qui se trouve dans la Bibliothèque Impériale Publique de St. Petersbourg, 1905, St. Petersberg.
 A. Shebunin, "Kuficheskii Koran Imp. SPB. Publichnoi Biblioteki", Zapiski Vostochnago Otdieleniia Imperatorskago Russkago Arkheologicheskago Obshchestva, 1891, Volume 6, pp. 69-133, especially the conclusions.
 S. Pissareff, Coran Coufique de Samarcand: écrit d'après la Tradition de la Propre Main du Troisième Calife Osman (644-656) qui se trouve dans la Bibliothèque Impériale Publique de St. Petersbourg, 1905, St. Petersberg.
 A. Jeffery & I. Mendelsohn, "The Orthography Of The Samarqand Qur'an Codex", Journal Of The American Oriental Society, 1942, Volume 62, No. 3, p. 195.
 F. Déroche, "Note Sur Les Fragments Coraniques Anciens De Katta Langar (Ouzbékistan)", Cahiers D'Asie Centrale, 1999, Volume 7, p. 65.
 F. Déroche, "Twenty Leaves From The Tashkent Qur'an", in S. Blair & J. Bloom (Eds.), God Is Beautiful And Loves Beauty: The Object In Islamic Art And Culture, 2013, Yale University Press: New Haven and London, p. 76. Déroche only very briefly sketches out the case for the attribution to al-Mahdi; elsewhere he points to a future publication of his where it appears he intends to set out the case more fully, see F. Déroche, Qurʾans Of The Umayyads: A First Overview, 2014, Koninklijke Brill nv: Leiden (The Netherlands), p. 128 & footnote 76.
 Islamic Art, Indian Miniatures, Rugs And Carpets: London, Tuesday, 20 October 1992 at 10 a.m. and 2.30 p.m., Thursday, 22 October 1992 at 2.30 p.m., 1992, Christie's: London, p. 88 (Lot 225). Also see F. Déroche, "Manuscripts Of The Qur'an" in J. D. McAuliffe (Ed.), Encyclopaedia Of The Qur'an, 2003, Volume 3, Brill: Leiden & Boston, p. 261; Islamic Calligraphy, 2003, Catalogue 27, Sam Fogg: London, p. 12. Sam Fogg's catalogue contains a typographical error here. The carbon dating reads 640-705 CE instead of 640-765 CE.
 E. A. Rezvan, "On The Dating Of An “‘Uthmanic Qur'an” From St. Petersburg", Manuscripta Orientalia, 2000, Volume 6, No. 3, p. 19.
 Y. Dutton, "An Umayyad Fragment Of The Qur'an And Its Dating", Journal Of Qur'anic Studies, 2007, Volume 9, No. 2, pp. 57-87.
 ibid., p. 60 and p. 63.
 ibid., pp. 63-64.
 S. al-Munajjid, Dirāsāt fī Tārīkh al-Khatt al-ʿArabī Mundhu Bidayatihi ilā Nihayat al-ʿAsr al-Umawi (French Title: Etudes De Paleographie Arabe), 1972, Dar al-Kitab al-Jadid: Beirut (Lebanon), p. 88, Plate 45.
 D. A. Kerr, The Illuminated Manuscripts Of Hartford Seminary: The Art Of Christian-Muslim Relations, 1994, Hartford Seminary Bookstore: Connecticut, p.12.
 Sotheby's, Arts of the Islamic World, 2004 (13th October 2004), Sotheby's: London, pp. 10–11.
 M. Fraser & W. Kwiatkowski, Ink And Gold: Islamic Calligraphy, 2006, Sam Fogg: London, pp. 18–21.
 F. Déroche, Qurʾans Of The Umayyads: A First Overview, 2014, op. cit., p. 128.
 Oriental Manuscripts And Miniatures, Friday 22nd October 1993 (Catalogue No. 93561), Sotheby's: London, pp. 18-23 (Lot 31). This leaf immediately precedes the leaf described in the previous Sotheby's auction containing the verses 2:264-277.
 B. Sadeghi & U. Bergmann, "The Codex Of A Companion Of The Prophet And The Qurʾān Of The Prophet", Arabica, 2010, Volume 57, pp. 348-354.
 ibid., p. 344.
 ibid., p. 353.
 ibid., pp. 344-347.
 J. G. Wetzstein, Catalog Arabischer Manuscripte In Damaskus Gesammelt, 1863, Druck von Trowitzsch & Sohn: Berlin, p. 2.
 ibid., p. 17.
 M. Weisweiler, Verzeichnis Der Arabischen Handschriften, 1930, Universitätsbibliothek Tübingen, Volume II, Verlag von Otto Harrassowitz: Leipzig, p. 125. (No. 161). Weisweiler gives the starting verse as 17:37. According to the verse numbering system adopted by the well-known modern printed editions, it is 17:35. The script is ḥijāzī though it is listed as kufic in the catalogue entry.
 A. Fedeli, "Relevance Of The Oldest Qur'ānic Manuscripts For The Readings Mentioned By Commentaries. A Note On Sura ‘Ta-Ha’", Manuscripta Orientalia, 2009, Volume 15, Number. 1, pp. 3-10; For more information about this manuscript and the collection where it is located see, idem., "The Kufic Collection Of The Prussian Consul Wetzstein: The 1100 Leaves Of The The Universitätsbibliothek In Tübingen And Their Importance For Palaeography And Qur'ānic Criticism", in R. M. Kerr & T. Milo (Eds.), Writings And Writing From Another World And Another Era: Investigations In Islamic Text And Script In Honour Of Dr Januarius Justus Witkam, 2010, Archetype: Cambridge, pp. 117-142.
 "Rarität entdeckt: Koranhandschrift stammt aus der Frühzeit des Islam" at Universitätsbibliothek Tübingen, Germany. Accessed on 25th December 2014.
 "Älteste bekannte Koran-Handschriften entdeckt", Der Tagesspiegel, 2nd April 2015. Accessed on 5th April 2015.
 J. J. Witkam, Inventory Of The Oriental Manuscripts Of The Library Of The University Of Leiden, 2007, Volume 15, Manuscripts Or. 14.001 - Or. 15.000, Ter Lugt Press: Leiden, p. 253.
 "Oudste Leidse Koranfragmenten ruim een eeuw ouder dan gedacht". For English translation of the same see "Oldest Quran Fragments in Leiden" at Leiden University. Both the links accessed on 29th December 2014.
 "Oudste Leidse Koranfragmenten ruim een eeuw ouder dan gedacht". For English translation of the same see "Oldest Quran Fragments in Leiden" at Leiden University. Both the links accessed on 25th December 2014.
 S. N. Noseda, "A Third Koranic Fragment On Papyrus: An Opportunity For A Revision", Rendiconti Classe Di Lettere E Scienze Morali E Storiche, 2004, Vol. 137, pp. 313-326 esp. p. 317. Noseda's history of the manuscript and its description of the script have been summarised above.
 G. Bonani, M. Broshi, I. Carmi, S. Ivy, J. Strugnell, W. Wölfli, "Radiocarbon Dating Of Dead Sea Scrolls", ‘Atiqot, 1991, Volume 20, pp. 27-32; G. Bonani, S. Ivy, W. Wölfli, M. Broshi, I. Carmi & J. Strugnell, "Radiocarbon Dating Of Fourteen Dead Sea Scrolls", Radiocarbon, 1992, Volume 34, No. 3, pp. 843-849. These dates were also reproduced by James VanderKam in The Dead Sea Scrolls Today, 1994, William B. Eerdmans Publishing Company: Grand Rapids (MI), p. 18, Table I. For a complete discussion see pp. 17-18. An overview of radiocarbon dating in 1991 was given by Hershel Shanks. See H. Shanks, "Carbon-14 Tests Substantiate Scroll Dates", Biblical Archaeology Review, 1991, Volume 17, No. 6, p. 72. Perhaps the earliest 14C dating on the Dead Sea Scroll material was done by Libby. He dated the linen wrapping the scroll and determined the value to be 1917 ± 200 BP. See W. F. Libby, "Radiocarbon Dates, II", Science, 1951, Volume 114, p. 291.
 A. J. T. Jull, D. J. Donahue, M. Broshi & E. Tov, "Radiocarbon Dating Of Scrolls And Linen Fragments From The Judean Desert", Radiocarbon, 1995, Volume 37, No. 1, pp. 11-19; A. J. T. Jull, D. J. Donahue, M. Broshi & E. Tov, "Radiocarbon Dating Of Scrolls And Linen Fragments From The Judean Desert", ‘Atiqot, 1996, Volume 28, pp. 85-91. Hershel Shanks provided an overview of this dating. H. Shanks, "New Carbon-14 Tests Leave Room For Debate", Biblical Archaeology Review, 1995, Volume 21, No. 4, p. 61.
 G. Bonani, M. Broshi, I. Carmi, S. Ivy, J. Strugnell, W. Wolfli, "Radiocarbon Dating Of Dead Sea Scrolls", ‘Atiqot, 1991, op. cit., p. 31.
 A. J. T. Jull, D. J. Donahue, M. Broshi & E. Tov, "Radiocarbon Dating Of Scrolls And Linen Fragments From The Judean Desert", Radiocarbon, 1995, op. cit., p. 17. For a dissenting view on the radiocarbon studies, see J. Atwill, S. Braunheim & R. Eisenman, "Redating The Radiocarbon Dating Of The Dead Sea Scrolls", Dead Sea Discoveries, 2004, Volume 11, No. 2, pp. 143-157.
 A. J. T. Jull, D. J. Donahue, M. Broshi & E. Tov, "Radiocarbon Dating Of Scrolls And Linen Fragments From The Judean Desert", ‘Atiqot, 1996, op. cit., Table I, p. 86. Table I gives the dating range for 1σ and 2σ confidence levels. The palaeographic dating is given in Table II on p. 88. The results of the 1995 radiocarbon dating of the Dead Sea Scrolls were described as "too gross and iffy to settle any arguments". See H. Shanks, "New Carbon-14 Tests Leave Room For Debate", Biblical Archaeology Review, 1995, op. cit., p. 61.
 The rarity of radiocarbon dating for manuscripts is due to its ‘inaccuracy’ and consequently its unenthusiastic support by palaeographers; therefore, it is rarely used. François Déroche says:
Establishing a date for the earliest copies is thus dependent upon palaeographic studies, dating the decorations or, in rare cases, upon scientific methods such as Carbon-14 dating.
See F. Déroche, "Written Transmission" in A. Rippin (Ed.), The Blackwell Companion To The Qur'ān, 2006, Blackwell Publishing Limited, p. 176. The views concerning radiocarbon dating are now changing among palaeographers.
 H-C. G. von Bothmer, K-H. Ohlig & G-R. Puin, "Neue Wege Der Koranforschung", Magazin Forschung (Universität des Saarlandes), 1999, op. cit., p. 46, note 39. The text in German reads:
Es wird oft gefragt, ob nicht derartige Untersuchungen zuverlässigere Ergebnisse brächten als die geisteswissenschaftlichen, und deshalb öfter herangezogen werden sollten. Dagegen spricht einmal, dass sie sehr kostspielig sind (die Bestimmung einer Probe kostet rund tausend Mark). Zum anderen ist die Unschärfe der Ergebnisse meist weitaus größer als in diesem Fall, und zumal bei Anwendung "traditioneller" Methoden.
 E. A. Rezvan, "The Qur'ān: Between Textus Receptus And Critical Edition", in J. Hamesse (Ed.), Les Problèmes Posés Par L'Édition Critique Des Textes Anciens Et Médiévaux, 1992, Institut D'Etudes Médiévales De L'Université Catholique De Louvain, p. 300; Also see E. A. Rezvan, "The Data-Base On Early Qur'an MSS: New Approach To The Text History Reconstruction", in A. Ubaydli & A. Brockett (Org.), Proceedings Of The 3rd International Conference And Exhibition On Multi-Lingual Computing (Arabic And Roman Script), 1992, The Documentation Unit, The Centre For Middle Eastern And Islamic Studies: University of Durham (UK), p. 3.3.4. These two essays are nearly identical in content.
 G-R. Puin, "Methods Of Research On Qur'anic Manuscripts - A Few Ideas" in Maṣāḥif Ṣanʿāʾ, 1985, op. cit., p. 10.
 S. S. Blair, Islamic Calligraphy, 2006, op. cit., p. 128.
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