Glasgow University Library MS. Ferguson 254. 22 folios. 232x179mm. 17th Century. 1. f1 De la pierre Philosophale. 2. f6-8 Les couches de la pierre philosophale. [Incomplete, breaks off at foot of f8v.] 3. f9-20 [Unidentified fragment of alchemical treatise in French, begins in middle of Chapter 21.] 4. f21-22 [Table for converting different measures of weight.] [Same binding as MS. Ferguson 252. See also MS. Ferguson 175.]