British Library MS. Sloane 3757. Paper. Octavo. 72 folios. 17th Century. 1. The entrance opened into the King's Palace, by an anonymous writer calling himself Philaletha Philosophus. ff.1-31. [Printed in Latin, Octavo, Amst. 1667.] 2. Sir George Ripley's Compound of Alchymy expounded by a sonn of art. ff.31-34. 4. Extract from the work of Artephius his secret book concerning the Philosophers Stone. ff.35-39. 5. Archbishop Dunstan's treatise of the Philosophers' Stone. ff.40-52. Published in Latin, among Ripley's works. 7. Alchymical extracts 'from Mr Moulton'. f.53. 8. Mr Moulton's Regulus or the Arcanum of Mercury. f.55b. 10. Chymical experiments from a MS. of an American Philosopher alias Eirenaeus Philalethes Cosmopolita. ff.63-67. 11. Rules for practice in the art of alchymy. ff.68b-71. Begins: 'That as the end you looke for is gold soe let gold be the subject on which you worke and no other'.