British Library MS. Sloane 1828. Paper. Folio. 170 folios. 17th Century. 20. Treatise upon Alchemy, written in the form of question and answer. [Imperfect.] ff.146, 148-150. The handwriting is the same as that of the following article. 21 Translation into English of Basil Valentine's treatise of the Great Stone of the ancient Philosopher. ff.145, 147,151.