Ptolemaeus Arabus et Latinus

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Oxford, Bodleian Library, Digby 168

s. XIV (f. 1-146).


f. 1-107 (including the Ptolemaic sections) and 131-135 were copied by Simon Bredon, probably at Oxford; f. 108-115 were copied in Italy; f. 116-130 and 136-138 in England; and f. 139-146 in probably in France (Boudet/Miolo).


Simon Bredon, who probably assembled the first part (f. 1-146) and bequeathed it to Merton College, Oxford, in 1372; Thomas Allen.

Parchment, 231 f. (foliation in pencil, upper right corner). Composite MS, of which the first part (f. 1-146) forms a unit copied by several hands. Folia are missing at the beginning and in several places, including between f. 20-21, 23-24, 64-65, 66-67, 69-70, 88-89, 115-116 and 130-131. The other parts date from the 13th and 14th c. acc. Macray.

Astronomy mainly: Richard of Wallingford, Quadripartitum, beginning missing (1r-13v); Alfraganus, De scientia astrorum, tr. John of Seville, end missing (13v-20vb); Ptolemaica (21r-39r); Campanus of Novara, Theorica planetarum (40ra-61va); Richard of Wallingford, Tractatus rectanguli (61va-64va); John of Ligneres, Equatorium planetarum (64vb-65rb); ‘Incipit secundus tractatus canonum fratris Rogeri de Cotum. Qui voluerit planetas equare seu eclipses solares…’, incomplete (65rb-66rb); John of London, De motu octave spere, end only (67ra); Ptolemaica (68ra-69vb); Roger of Hereford, Theorica planetarum (69vb-83vb); canons of Toledan tables (84ra-93vb); Theorica planetarum Gerardi (94ra-98ra); ‘Hic incipit almenak. In faciendo almenak sunt primo extrahendi…’ (98ra-98vb); ‘Incipit theorica planetarum nova. Sit circulus a et circulus signorum, id est zodiacus…’ (99ra-107rb); ascension tables (107v); Theorica planetarum Gerardi (108ra-113vb), with incomplete diagrams (114v-115r); astrological diagram (115v); anthology of texts of astronomy, geometry, arithmetic and optics, including by Geminus of Rhodes, Menelaus, Archimedes, Tres Fratres Filii Moysi, Autolicus, Ametus filius Josephi, Alkindi and Tideus (116ra-130vb); John of Saxony, Canones (131ra-135va); latitude tables for superior planets (136v-138r); Alfonsine tables (139r-144v and 146v); John of Ligneres, Canones (145ra-146rb). Blank: 39v, 66v, 67v, 114r, 135vb-136r, 138v. The other parts of the MS (147-231) contain historical and theological texts.

Bibl. G. D. Macray, Catalogi codicum manuscriptorum Bibliothecae Bodleianae, IX: Codices a viro clarissimo Kenelm Digby, Oxford, 1883, 172-177; M. Clagett, Archimedes in the Middles Ages, I, Madison, 1964, xxvi-xxvii; F. S. Benjamin, G. J. Toomer, Campanus of Novara and Medieval Planetary Theory, Theorica planetarum, Madison-London, 1971, 66; J. D. North, Richard of Wallingford: An Edition of His Writings with Introduction, English Translation and Commentary, Oxford, 1976, II, 32 and 35-36; F. S. Pedersen, The Toledan Tables. A Review of the Manuscripts and the Textual Versions with an Edition, København, 2002, 144-145; J.-P. Boudet, L. Miolo, ‘Alfonsine Astronomy and Astrology in Fourteenth-Century Oxford. The Case of MS Bodleian Library Digby 176’, in Alfonsine Astronomy: The Written Record, eds R. Kremer, M. Husson, J. Chabás, Turnhout, 2022, 57-106: 72-74.


‘Bredon [in the upper margin, apparently by another hand]. Edicio Bredonis de Almagesti [lower margin, hand of the scribe]. Quoniam princeps nomine Albuguafe in libro suo quem scientiarum electionem et verborum nominavit — erunt qui provenerint anni Nabugodonosor, qui sunt per quos intrabis in hunc librum’ (followed by the two tables ‘Ferie annorum’ and ‘Reductio earum’).

= Simon Bredon, Commentum super Almagesti (C.1.8)

. Preface, 21r; I, 21r-23v (with lacuna I.3-12 due to three missing folia between f. 21 and 22); II, 24r-30v (beginning gone due to two missing folia between f. 23 and 24); III, 30v-39r. Corrections and marginal notes by the scribe (Simon Bredon).


‘Liber Thebit [title in upper margin, hand of the scribe]. Liber quem edidit Thebit filius Thore de hiis que indigent expositione antequam legatur Almagesti. Equator diei est circulus maior qui describitur — propinqui oppositioni erit retrogradi. Explicit.’