Oxford, Bodleian Library, Fairfax 27

Century	13 \| 14
Place of origin	England
Language	French \| Latin
Previous owners	50v has "A mon trescher et bien amy Robert de Stkyrkland" (sic), s. 15, repeated in English by Charles Fairfax. A hand of about 1400 has written "Bolton" on 24v, whence Fairfax inferred that the volume came from the Augustinian priory in Craven.
Composite ms.	3 parts
Material	Membr.
Height × width	7 1/10 x 5 1/5 in.
No. of leaves	ii + 95
Binding leaves	The fly-leaves are from a s. 15 missal with music (ii), and a s. 14 treatise on Roman law (95).
Cover	White leather on bevelled boards, with traces of strap and central boss, s. 15 English work.
Printed catalogs	F. Madan, H.H.E. Craster & N. Denholm-Young, A summary catalogue of western manuscripts in the Bodleian Library at Oxford II 2 (1937) 785-6 # 3907.
Source	Folkerts \| Madan et al. (1937)
Type of source	cat. \| pvt. notes
Source’s source	insp.

Work 1	Title (ms.)	Varia, inter quae:
Work 2	Title (ms.)	Various scientific treatises including:
	Century	14/I
	No. of ms. part	III (26-)
Work 3	Author standard	Alexander de Villa Dei
	Title (ms.)	Carmen de Algorismo
	Incipit	Hec Algorismus ars presens dicitur
	Folio no.	27-
	Rubric	Carmen de Algorismo
	Additional texts	Preceded (26v) by a calendarial piece known from his incipit as "Cisio Janus".
	Glosses etc.	With contemporary prose commentary in margin.
	Additional copies	GOxfB Digby 22, 1-7v.
Work 4	Author standard	Alexander de Villa Dei
	Title (ms.)	Massa Compoti
	Incipit	Aureus in Jano numerus clavesque notantur
	Additional remarks	With the prose commentary, but without prologue.
	Folio no.	32-
	Rubric	Massa Compoti
Work 5	Author standard	Holcote
	Title (ms.)	A treatise on the planets
	Incipit	Gloriosus et sublimis deus creator omnium
	Folio no.	44-
	Tables	With tables.
	Additional copies	Cf. GLonB Royal MS. 12 B. XXV, 254.
Work 6	Author standard	Johannes de Sacrobosco
	Title (ms.)	Tractatus de Spera
	Incipit	Distinguimus primo quid sit spera
	Folio no.	59-
	Rubric	Tractatus de Spera in quatuor capituli.
	Math. drawings	Preceded by two full-page illustrations
	Additional copies	GOxfB Digby 15 contains another copy.
Work 7	Title (ms.)	A brief treatise on arithmetic
	Incipit	Sunt autem quidem (for quedam) subtilia universis numerandi questionibus
	Printed catalogs	C. Singer & D.W. Singer, Hand-list of scientific MSS. in the British Isles dating from before the sixteenth century # 231; cf. D.W.Singer, Transactions of the Bibliographical Society 15 (1917-9).
	Folio no.	67-
	T & K	TK 1540
Work 8	Additional names	Pythagoras
	Title (ms.)	The beginning of the "sphaera Pythagorae"
	Incipit	Ceo est la resoun del exsper' qe Pictagorus fist
	Language	French
	Folio no.	69-
	Additional copies	Other copies are in GOxfB Bodley 26 & GOxfB Bodley 177.
Work 9	Title (ms.)	Tables
	Contents	Calendarial and astronomical tables for lunar cycles, conjunctions, and eclipses, and explanatory notes.
	Incipit	(78v) Quidam homines multum affectant scienciam astronomie
	Folio no.	17- <71- ?>
	Math. drawings	(79v) Followed by three diagrams of eclipses.
Work 10	Author standard	Gerardus Cremonensis
	Title (ms.)	Theorica planetarum (inc.)
	Incipit	Circulus eccentricus vel egresse cuspidis
	Folio no.	81-
	Rubric	theorica planetarum
	Math. drawings	With diagrams.
Work 11	Author standard	Johannes de Monte Pessulano \| Johannes de Munpellers
	Title (ms.)	Compositio quadrantis (or) vetus quadrans
	Incipit	Geometrie duo sunt partes, scilicet theorica et practica. Theorica est enim que solamentis speculatione
	Printed copies	F.N.L. Britt, A critical edition of Tractatus quadrantis (1972) 308.
	Folio no.	88-
	Rubric	compositio quadrantis
	Colophon	(91v) Explicit tractatus veteris quadrantis.
	Tables	(92) Followed by further astronomical tables.