Project icon: lavishly furnished initial letter with a painting of Ptolemy using an astrolab.

Ptolemaeus Arabus et Latinus

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Oxford, Hertford College, 3

s. XIVin (f. 1-12; the rest of the MS is from the later 14th and 15th c.).


Hertfort College (i.e. Magdalen Hall) since at least 1873, ‘ex dono Nath. Friend de Westerby in agro Glocestrensi’ (f. 1r).

Parchment, 78 f. Composite MS made of several parts from the 14th and 15th c., the first of which (f. 1-12) forms one unit copied by one or two similar neat hands with decorated initials.

Astronomy (f. 1-12): Thebit Bencora, De recta imaginatione spere et circulorum eius diversorum (1ra-1vb); Ptolemaica (1vb-3va); Pseudo-Thebit Bencora, De motu octave spere (3va-6ra); Thebit Bencora (?), De quantitate stellarum et planetarum et proportione terre (6ra-7ra); Theorica planetarum Gerardi (7ra-11va); Berengarius, De horologio viatorum (11va-12vb). The other parts (f. 13-78) also contain astronomical material, mainly the canons of the Alfonsine tables and of the Toledan tables.


H. O. Coxe, Catalogus codicum qui in collegiis aulisque Oxoniensibus hodie adversantur, II, Oxford, 1852, 5; F. S. Pedersen, The Toledan Tables. A Review of the Manuscripts and the Textual Versions with an Edition, København, 2002, I, 152.


‘Incipit secundus tractatus Thebith de hiis que indigent expositione antequam legatur Almagesti. Equator diei est circulus maior qui describitur super duos polos orbis — propinqui oppositioni erunt retrogradi. Expletus est liber Thebith filii Core de hiis que indigent expositione antequam legatur Almagesti.’