Leiden MS. Vossianus Chym. Q. 39. 75 folios. Paper. 203x150mm. 17th Century [1610.] 1. f1 [Tétrastiche to the Emperor Rudolf II. 2. f2v-6 Merlin, De expositione lapidis philosophici liber. 3. f7-17 Merlin [?], Versus de lapide philosophico [and George Ripley's 'Liber duodecim portarum'.] 4. f18v-22v Vergilius philosophus, De lapide philosophico. 5. f23v-33 George Ripley, Cantilena de lapide philosophico. 6. f34-52 Opera chemica [in English.] 7. f53-56 Elixir lapidis Benedicti.