Tuesday, August 11, 2026

Theodore De Bruyn on the Transmission of Pelagius's Commentaries

  

Authenticity, Transmission, and Authenticity

 

No manuscript ascribing the commentaries to Pelagius has survived, but there is no doubt that he was their author. When Augustine introduces the third book of On the Merits and Forgiveness of Sins and on Infant Baptism, composed in 411 CE, he explains that he had read 'some works by Pelagius . . . containing very short explanations [expositiones breuissimas] of the letters of the apostle Paul' (Pecc. merit. 3,1.1; Souter 1922: 4). This motivated him to refute certain arguments against the transmission of sin from Adam to his descendants, relayed by Pelagius in his comment on Rom. 5:15, which Augustine then quotes (Pecc. merit. 3.2.2, 3.3.5; Souter 1922: 40-41). About two decades later, in a brief prepared for the church in Constantinople, Marius Mercator states that Pelagius composed commentaries (commentarios) on the Pauline letters for a circle of friends prior to the sack of Rome in 410 (Commonitorium super nomine Caelestii 2.1; Souter 1922: 4). In that work Mercator paraphrases Pelagius' comments on Rom. 5:12-14 (Souter 1922: 41-44).

 

A century later, if not earlier, the commentaries were already circulating under another name. When Cassiodorus in his Institutes (begun in the 530s) describes commentaries on the apostolic (not just Pauline) letters, he begins with a set of glosses (annotationes) on thirteen Pauline letters that were widely known and admired but erroneously attributed to Pope Gelasius. Cassiodorus, detecting 'the poison of the Pelagian error' in these glosses, undertook to remove the offending passages, a task he completed for the commentary on Romans, leaving the rest of the commentaries to his students (Inst. 1.8.1; Johnson 1989).

 

Early on, the commentaries were used in monastic circles in Ireland (Zimmer 1901; Kelly 1978), England (Dumville 1986), and the Continent (Frede 1975-1991: 1026), as one can see from quotations taken from the commentaries or copies made of them. Although the commentaries were popular in Irish circles, the Irish were not the exclusive means of their early transmission, as was once thought ( de Bruyn 1993: 28-29 ). From glosses introduced into early medieval copies of the text of the Pauline letters with a sign indicating that they came from Pelagius (Zimmer 1901: 39-112, 137-155; Souter 1922: 5, 25-28, 326-330; Picard 2003; De Paor 2016; Dunphy 2019), it is evident that Pelagius was known to have produced commentaries on the Pauline letters, probably because the manuscripts from which the glosses were derived attributed the commentaries or the comments to Pelagius (Zimmer 1901: 156-158; Souter 1922: 28). But otherwise the commentaries were transmitted throughout the Middle Ages anonymously or under the name of Jerome.

 

The texts preserved in manuscripts of the commentaries, some of which can be grouped into families, differ. Although early modern scholars from Erasmus onwards no longer accepted that the commentaries were by Jerome and suspected or argued that they were by a Pelagian, they were misled in their efforts to ascertain the author by the absence in the prevailing text of the commentaries (in the tradition now called pseudo-Jerome) of exact parallels to the passages quoted by Augustine and paraphrased by Mercator. This led them to conflate the pseudo-Jerome commentaries with the expurgated version produced by Cassiodorus and his students (Souter 1922: 6- 24), which in the first printed edition in 1537 was erroneously attributed to Primasius (Souter 1922: 319-321). It is owing to the observations of Heinrich Zimmer (1901), Cuthbert Turner (1902), Sigmund Hellmann (1906) (see Souter 1922: 28-33), and above all Alexander Souter that several strands of the commentaries' early transmission were unravelled and distinguished: the original commentaries by Pelagius; copies of Pelagius' commentaries with additional material found primarily but not exclusively in the pseudo-Jerome family of manuscripts; and the revision of Pelagius' commentaries by Cassiodorus and his students.

 

As Souter demonstrated in the introduction to his edition of the commentaries, two manuscripts to which Souter gave the sigla A and B-Karlsruhe, Badische Landesbibliothek, Augiensis CXIX (A; 8th-9th c.) and Oxford, Balliol College 157 (B; 15th c.)-have the strongest claim to preserving the text of Pelagius' commentaries. They attest to the passages quoted by Augustine and paraphrased by Mercator completely and, importantly, without the additional material found, to varying degrees, in all the other witnesses (Souter 1922: 34-48). Their fidelity to a very early transmission of the commentary is further demonstrated by leaves from a sixth-century manuscript, Vatican, Bibliotheca Apostolica Vaticana lat. 10800 (Mercati 1907). The leaves preserve a text similar to that in B (Souter 1922: 48-51, 226-228). In reconstructing the text of Pelagius' commentary, Souter justifiably relied on A and B, while also taking into consideration the witnesses of the other manuscripts, Cassiodorus' revision, and early medieval glosses.

 

The two manuscripts are not without difficulties. They present different versions of the text of the Pauline letters (see below), and they each include material that the other omits. The text in A is shorter and, on the whole, more reliable than the text in B, whose scribe was copying from a defective manuscript (Souter 1922: 211-212, 216-223). The text in B includes comments that were added to Pelagius' commentary by a 'Pelagian' writer within decades of its circulation-the so-called pseudo-Jerome interpolations that were published by Souter (1922: 265-267; 1931) and then verified with greater precision by Hermann Frede in his edition of a manuscript-Budapest, Hungarian National Museum codex latinus medii aeui 1 (800 CE)-that preserves comments from an anonymous commentator used by Pelagius as well as comments from the later interpolator (Frede 1973: 164-205; 1974; on the manuscript, see further Dunphy 2013, 2014, 2015; Maclachlan 2014). Occasionally A also includes comments not found in the other witnesses.

 

More problematic in A, however, are variations in the phrasing of a comment that alter its meaning in what might be considered an 'Augustinian' direction. These variants are often, but not always, also found in one other manuscript, St Gall, Stiftsbibliothek 73 ( G; 9th c.). Many of the variants occur in the commentary on Romans, the Pauline letter that had the greatest bearing on the central interpretative questions of the early Pelagian controversy (de Bruyn 1993: 32-33). Were these variants present in the original commentary and later altered by a reviser, or were they absent from the original commentary and later added by a reviser? While there is no decisive evidence to eliminate one of these possibilities, the presence elsewhere in Pelagius' commentaries of remarks similar to those that are disputed, but with the support of multiple witnesses, argues in favour of regarding these variants as coming from Pelagius ( de Bruyn 1993: 33-34; Matteoli 2011). But, even if one questions the authenticity of these variants, most of the text of the commentaries has been transmitted with only inconsequential discrepancies among the witnesses. To exclude the entire work from consideration when studying Pelagius' thought and practice (see A. Bonner 2018: pp. xvii-xviii) is too radical as a general method, since it dispenses with much that probably comes from Pelagius. A more nuanced approach would be to be cognizant of variants that introduce significant alterations in meaning and weigh their value as warranted (see e.g. Matteoli 2011) . Souter's practice ( 1926: p. viii) of marking points where A and B diverge with square brackets in his edition is useful for that purpose. These are replicated in the translations of de Bruyn ( 1993 ) and Scheck (2022), as well as in the quotations below. However, one must always consult the apparatus in Souter's edition, since the variants differ in type and importance. (Theodore De Bruyn, “Exegetical Commentaries by Pelagius,” in The Oxford Handbook of the Pelagian Controversy, ed. Anthony Dupont, Giulio Malavasi, and Brian Matz [Oxford: Oxford University Press, 2025], 281-84)