Glasgow University Library MS. Ferguson 70. 37 folios on vellum. 172x121mm. 16th Century. Marbodus, Bishop of Rennes. De natura lapidum. [Manual of precious stones with verses and descriptions.] [The verses corresponding to the gems are the same as are found in Marbodus, 'De lapidibus pretiosis enchiridion', Friburgi, 1531.] [Inscribed on f1v]: 'Marbodeus gallus autor'. [Added in later hand]: '1530'.