Leiden MS. Vossianus Chym. Q. 49. 100 folios. Paper. 198x151mm. Second half of 16th Century. [Book on the Philosophers' Stone in German.] 1. f1-18 De generatione. 2. f18-38v De generatione homunculi. 3. f38v-62v Vonn den Siluestris. 4. f62v-67 De generatione de edlen gstain. 5. f67v-91v De crescentibus.