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Ptolemaeus Arabus et Latinus

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London, British Library, Harley 1

s. XIII1 (f. 1-46; after 1217, date of the translation of Alpetragius’s De motibus celorum) and XIV1 (f. 47-160).


England, probably Oxford for f. 1-46 acc. Barker-Benfield.


John of London, monk of St Augustine of Canterbury (fl. c. 1290-1330); St Augustine of Canterbury; John Dee in 1557 (f. 1v); Sir Simonds d’Ewes (d. 1650); Robert Harley (d. 1724).

Parchment, 160 f. Composite MS made of two parts united by John of London: f. 1-46, copied by three hands (f. 1-23, 24-40 and 41-46), and f. 47-160, copied by one main hand (possibly by John of London acc. Thomson).

Astronomy and astrology: table of contents of the whole MS, end of 15th c. (1v); Alpetragius, De motibus celorum (2r-15v); Ptolemaica (16r-17r); Thebit Bencora, De figura sectore, anonymous tr. (17r-18v); Pseudo-Thebit Bencora, De anno Solis (19r-22r); Thebit Bencora, De figura sectore, alternative tr. ‘Inter universas geometrice…’ (22r-23v); Albumasar, Flores (24r-30v); Albumasar, De revolutionibus annorum mundi (31r-40v); geometry ‘Artis cuiuslibet consummatio…’ (41r-46v); Petrus de Dacia, Expositio super Algorismum (47ra-55vb); Robertus Anglicus, comm. on Sacrobosco’s De sphera (55vb-63vb); comm. on Sacrobosco’s Computus (64ra-70va); Ptolemaica (70va-79va); Ars algorismi de fractionibus (79vb-80va); Johannes de Puchro Rivo, comm. on Sacrobosco’s Computus (80va-85ra); John of Sicily, comm. on the canons of the Toledan tables (86ra-146rb); John of Jandun (?), Questio super epicyclis et eccentricis ‘Quoniam per acquisicionem prime philosophie…’ (146rb-148va); John of St Amand (?), Questiones mathematicales, incomplete (149ra-160vb). Blank: 1r, 85v. The MS originally included, after f. 46v, Alkindi’s De aspectibus, now in MS Oxford, Corpus Christi Coll., 254, f. 207r-212r (Thomson).


A Catalogue of the Harleian Manuscripts in the British Museum, London, 1808-1812, 4 vols, I, 1; M R. James, List of manuscripts Formerly Owned by Dr. John Dee, Oxford, 1921, 19 (no. 28); A. G. Watson, The Library of Sir Simonds d’Ewes, London, 1966, 136 (A281); C. E. Wright, Fontes Harleiani. A Study of the Sources of the Harleian Collection of Manuscripts in the British Museum, London, 1972, 370; F. S. Pedersen, Scriptum Johannis de Sicilia super canones Azarchelis de tabulis Toletanis, København, 1986, 24-25; P. O. Kristeller, Iter Italicum, IV, London-Leiden, 1989, 154; J. Roberts, A. G. Watson, John Dee’s Library Catalogue, London, 1990, 114-115 (M28); F. S. Pedersen, The Toledan Tables. A Review of the Manuscripts and the Textual Versions with an Edition, København, 2002, I, 72; B. C. Barker-Benfield, St Augustine’s Abbey, Canterbury, London, 2008, II, 1154-1158 (BA I.1147); R. M. Thomson, A Descriptive Catalogue of the Medieval Manuscripts of Corpus Christi College Oxford, Oxford, 2011, 133.


‘Thebit de hiis que indigent expositione (title added by another hand in upper margin). Equator diei est circulus maior qui describitur super duos polos orbis ― in oppositione Solis aut propinqui oppositioni erunt retrogradi. Explicit.’

= Thebit Bencora, De hiis que indigent expositione antequam legatur Almagesti (C.1.1). A few marginal corrections by a contemporary or somewhat later hand.


Hic incipiunt scripta super Centilogium Tholomei [title added in the margin by a contemporary hand]. Sicut dicit Ptholomeus in proverbiis Almagesti: Non fuit mortuus qui sapientiam vivificavit, nec fuit pauper qui intellectum dominatus est — Ita et ortus istius et ideo non planeta dicenda sunt. Hic satis enim dictum est superius. Deo gratias. Amen. Explicit scripta supra Centilogium Ptholomei edita a magistro Guillermo de Aragona.

= William of Aragon, Scripta supra Centilogium Ptholomei (C.3.6). No glosses.