A catalogue of Western manuscripts at the Bodleian Libraries and selected Oxford colleges

Merton College MS. 306

Former shelfmark: H. 3. 7

JOHN DUMBLETON; S. XIV (after 1321)


Language(s): Latin

1. (fols. 1–6)
Ps.-JOHN DUMBLETON, De Logica Intellectuali
Incipit: De sophismatibus que non re sed nomine insolubilia existunt, superest pertractare
Explicit: de omni propositione facta posita et proposita.
Final rubric: Explicit tractatus de diuersis insolubilibus et de significatione et suppositione terminorum et confusione et distribucione eorundem et de modis equalibus signis uniuersalibus et de arte obligatoria cum aliis incidentibus.

A commentary on an unidentified logical Summulae, written later than 1321. unpr.; also in Klosterneuburg, Bibl. des Chorherrenstifts 670: J. Weisheipl, ‘Ockham and some Mertonians’, Medieval Studies 30 (1968), 163–213, at pp. 204–5; id., ‘Repertorium Mertonense’, p. 211; P. V. Spade, The Medieval Liar; A Catalogue of the Insolubilia-Literature (Toronto, 1975), pp. 34–5.

On the originally blank f. 6 col. b was added, c. 1400, ‘O rex Anglorum que sunt iam facta uideto’(WIC 12953), 30 lines. On f. 6v, in a somewhat earlier hand, the heading trimmed by the binder, ‘Incipit questio 8 partis Dymbylton’, followed by twenty-four quaestiones.

2. (fols. 7–121v)
JOHN DUMBLETON, Summa Logicae et Philosophiae Naturalis
Incipit: Plurimorum scribencium grati laboris dignique memoria particeps
Incipit: Incipiendum est a primis cum inuenimus error in principio
Explicit: (ends impf. in Pars IX c. 11) et indigestum manet diu propter grossitudinem (catchwords) mᵉ ideo non

Extracts ed. E. D. Sylla, The Oxford Calculators and the Mathematics of Motion 1320–1350 (New York, 1991), pp. 565–625; Lohr, pp. 188–9; Sharpe, Handlist, pp. 238–9.

fols. 46–50v (between Parts III and IV) blank; also 87v-8v (between Parts VII and VIII), and f. 113v (between Parts VIII and IX).

At the foot of f. 88v are pencilled ‘peraffi XIIII ?Boradur XXXI | 8 p(eci)e X’ and ‘XXXI’ again.

Physical Description

Secundo Folio: una preter legem
Form: codex
Support: Parchment
Extent: 125 leaves (ii + 123)
Dimensions (leaf): 305 × 220 mm.
Dimensions (written): 265 × 195 mm.
The edges heavily retrimmed and stained yellow. Made from rough parchment with the natural edge of the skin often visible on fore- and lower edges. Early foliation, 1–119.


A bifolium at each end / 16, 2–412, 58, 6–712, 814, 96(quires of 6 and 4 inserted after 3), 108(+ 1 after 8), 118; catchwords and leaf-numbers.


Frame-ruled with pencil in 2 cols; written in c. 57 lines.


Written throughout in a single anglicana hand.


Probably Oxford work; blue initials flourished in red; red or blue paraphs.


Standard Merton s. xvii; sewn on four bands; the post-medieval chain-staple formerly near the foot of the foredge of the front board. The outermost leaves were pastedowns in an earlier binding. At the head of f. 123 is the mark of an iron chain-staple.


Origin: S. XIV (after 1321) ; England, probably Oxford.

Provenance and Acquisition

Probably made in Oxford.

On f. 122v many notes have been erased or washed off. What can still be read are: ‘Laurenz’, ‘Iohannes Laurenz’ (erased), ‘Liber Simonis de Lambourne prec’ iii s.’ (erased), and an erasedcautio of John Risborough (see MS 113) in the Rede chest, 1391, ‘et habet supplementum uiz. Summam Occam’.

On f. 123 are five partly-erased cautiones of the same man, ‘exposita in cista Vaghan et Huse’, dated 1379–85, and ‘Liber Iohannis Laurenz ex dono Magistri Simonis Lambourne’. Risborough (BRUO 1577–8) was chaplain to the College in 1364, fellow 1373–97. For Lambourne, fellow 1347–61, see MS 71, which he left to the College. John Laurenz is probably too late to be the man (pace BRUO 1108) who pledged Balliol Coll. 118–19 in 1325.

John Bale saw the book at Merton (Appendix C, no. 19). Inside the front board is a sheet of paper with a table of contents, s. xvii, and ‘Q. 3. 8. Art:’, canc. and replaced with ‘H. 3. 7 (CCCVI)’ in red; the College bookplate. ‘8’ is inked on the foredge.

Merton College MS. 306 - fragment (fols. i-ii)


Language(s): Latin

(fols. i-ii)
Commentary on a philosophical text,

f. i much effaced, on f. ii begins a section ‘Quilibet homo morietur quia unus solus homo morietur. Hoc soluatur sic probatur aliquis homo morietur’; iiv begins a section ‘Necesse est aliquid condensari si aliquid rarefiat. Quod arguitur sic: non potest esse quod aliquid condensetur si aliquid rarefiat’.

On f. ii the text mentions London and Oxford.

Physical Description

Form: codex
Support: Parchment
Dimensions (leaf): 285 × 190 mm.
Dimensions (written): 230 × 145 mm.


Frame-ruled in 2 cols of 66 lines.


Written in a small anglicana hand.


Blue initials flourished in red; red or blue paraphs; probably Oxford work, all similar to the main book.


Origin: s. xiv1 ; England, probably Oxford

Merton College MS. 306 - fragment (fol. 122)


Language(s): Latin

(fol. 122; 123v blank)
Incipit: (Beg. impf.) faciamus apparere breuissimas et quo res longe positas quamlibet paruas
Explicit: est prope terram et ipsius expansio.
Final rubric: Explicit tractatus domini Lincolniensis de yride.

Ed. L. Baur, BGPTM 9 (1912), pp. 75 line 33–76 line 34; Thomson, Grosseteste, p. 106; Lindberg, no. 86B.

At the foot is ‘Stella celi exstirpauit que lactauit Dominum’ (quatrain; Chevalier 19438).

Physical Description

Form: codex
Support: Parchment
Extent: From the end of another book
Dimensions (written): 230 × 190 mm.


41 long lines without visible ruling.


Written in an anglicana hand.


Origin: s. xiv ex. ; script of English appearance.

Additional Information

Record Sources

R. M. Thomson, A descriptive catalogue of the medieval manuscripts of Merton College, Oxford (Cambridge: D. S. Brewer), 2009.


For enquiries relating to this manuscript please contact Merton College Library.


    Coxe, pp. 121–2; Powicke, no. 524.

Funding of Cataloguing

Conversion of the printed catalogue to TEI funded by the Warden and Fellows of Merton College .

Last Substantive Revision

2019-11-05: First online publication

See the Availability section of this record for information on viewing the item in a reading room.