An imperfect manuscript containing astrological texts and tables in Welsh and English in the hand of David Jones ('Dewi Fardd'), Trefriw, including 'Brydyn Cymraeg neu Almanac am y flwyddyn ... 1681 oed y byd 5630' by or attributed to 'Robert Lewis M:D:' of Dublin 'Printiedig ir Athro ... om ty yn chequer lane gwedderbyn ac arwydd y Carw Gwyn: Dulyn, o'r Werddon y 10 o fis Gorphenhaf 1680' (ff. 14 verso-16) and 'Astronomi Rheol y Ser ('gwaith Dr. Davies') (ff. 31-6); and also a transcript of 'Digrifwawd neu ymgynhebygiad i owdl y misoedd' by Siôn Tudur (ff. 7 verso-13).

Three Welsh Grammars; The Dream of Maxen Wledig; Elucidarium; Commotes and Cantreds of Wales; Astronomi; etc., mainly in the hand of Thomas Williams before he began to sign himself 'Thomas ap Wiliam physicwr'. Pages 112-114 and 129-130 are in the autograph of Robert Vaughan of Hengwrt, 16th May 1656, and Darogan Beli (p. 216) appears to be written by D. Jones (?o Lanvair Dyffryn Clwyd).

A manuscript containing scholastic tracts including disputations on Aristotle's 'De Anima' said to have been collected by Master Benedict and pronounced by the Master Regent of 'Fragfordie' [sic] in 1418; treatises on 'ars algoristica', physiology, and astronomy; 'liber de causis', probably the work of David Iudaeus [David ben Yom Tov]; 'comptus norembergensis'; and fragments of other texts, including a sheet containing verses beginning 'lumina lauas surgens gelida manus vnda' (cf. Schola Salerni).