British Library MS. Sloane 410. Paper. Quarto. 50 folios. 16th Century. 1. f1 A treatise on the philosopher's Stone; [conjectured by Sir Hans Sloane to be possibly by Edward Kelley.] Begins: 'Here it is necessarie, that ye understand howe that olde philosophers.' 2. f31 [Various alchemical receipts and processes.]