In the past two years, partly to supplement in special fields the collections of the Middle English Dictionary, I have been searching the catalogues of manuscripts of English libraries for mediæval curiosities. Of these, early grammatical writings in English are not the least interesting. I have now four Latin grammatical pieces written in English in the fifteenth century: I, an anonymous grammar in St. John's College (Cambridge) MS. 163, f. 1a, printed below; II, another from Trinity College (Cambridge) MS. 0.5.4, f. 5a, printed in Essays and Studies in Eng. and Comp. Lit. in the series in Language and Literature, University of Michigan, xiii (1935), pp. 81–125; III, another in Douce MS. 103, f. 53a, printed below; and IV, a disquisition by a schoolmaster of Beccles (Suffolk), one John Drury, on the comparison of adjectives and adverbs in Cambridge Additional MS. 2830, f. 54a, printed in Speculum, ix (1934), 70–83. (I shall usually refer to them herein as I, II, III, and IV.)