Leiden MS. Vossianus Chym. Q. 54. 265 folios. Paper. 192x164mm. Second half of 16th Century. 1. f1-13 Epistula de tinctura [in German.] 2. f13-20v Cardinalis quidam, via universalis ad album et rubeum elixir [in German.] 3. f21-121 [Various alchemical operations in Latin and German.] 4. f121v-124 Aureum potabile preciossimum et tinctura magna [in German.] 5. f124-128v Johannes de Rupescissa, Opus bonum de sulphure communi [in German.] 6. f128v-131 Johannes de Rupesciss, Multiplicatio [in German.] 7. f131-134v Johan Knauer clericus ac discipulus philosophorum, versus de alchimia [26 Latin verses.] 8. f134v-140v K. L., Ex libello de investigatione secreti occulti. 9. f141-205 Operationes variae [in German.] 10. f206-209 Historia spagirica.