I. On the four causes of human ignorance: authority, custom, popular opinion, and the pride of supposed knowledge.
MS. Brit. Museum: Cott. Jul. F vii. fol. 186.
II. On the causes of perfect wisdom in Holy Scripture, or, On the dignity of philosophy.
III. On the usefulness of grammar.
This part, Charles points out (p. 62), is not perfect in Jebb’s edition: see Opus Tertium, cap. XXVI, XXVII.
IV. On the usefulness of mathematics.
MSS. London:—British Museum: Cotton, Tib. C. V. (sec. xiv); Julius D. V. ‘De utilitate scientiarum’; Julius F vii. fol. 178 (sec. xv), ‘Declaratio effectus verae mathematicae.’ And fol. 180, ‘De moribus hominum secundum complexiones et constellationes.’
Royal 7 F vii, p. 1 (sec. xiii), ‘Pars quarta compendii studii theologiae’; pp. 82-125, ‘Descriptiones locorum’; pp. 133-140, ‘De utilitate astronomiae,’ or ‘Tractatus de corporibus coelestibus.’
Sloane 2629, f. 17, ‘De utilitate astronomiae.’
Also Lambeth Palace Library 200 (sec. xv), ‘De arte mathematica.’