Leiden MS. Vossianus Chym. Q. 16. 186 folios. Paper. 208x155mm. 16th Century [before 1596.] 1. f1-86v Johannes Isaac Hollandus, Liber de mineralibus. 2. f87-126v Isaac Holandus, De imperfectorum metallorum metamorphosi. 3. f127-149 Isaac Holandus, De lapide philosophorum. 4. f150-159v [Table of contents.]