British Library MS. Sloane 95. Paper. Quarto. 258 folios. 17th Century. [Treatises on medicine, botany and alchemy.] 6. f152 [A letter on the transmutation of metals and other alchemical processes.] [Inscribed] 'To his verie worthie and espetially respected frend, a true lover of arts and learninge, Mr George Leister, gent., A. B. wisheth all prosperous fortunes, true happines and joyefull eternitye.'