Leiden MS. Vossianus Chym. Q. 31B. 137 folios. Paper. 203x140mm. 16th Century [1573.] 1. f1-125 [Various extracts from philosophical, and religious works, together with soem poems.] 2. f126-127v Clavis ad intelligendum materiam Tincturae Universalis et processum quorundam philosophorum. 3. f128v-130 [Various notes and recipes.]