British Library MS. Sloane 2169. Paper. Folio. 91 folios. 17th Century. 1. Collection of chymical and alchymical receipts. ff.1-25, 28-34. 2. 'Medulla operationum variarum Druideae neptis Hermetis aliorum philosophorum.' ff.26-27. 3. Treatise upon Alchemy. ff.35-62. The heading of the first chapter is as follows:- 'The preface of the author directed to his son in the which he declareth the things necessary to the composition of the stone of the wisemen.' The first chapter begins:- 'My son, after I had long time consulted with myself whether I should leave you in writing the hidden secrets of the Cabbala of the wise-men.' 4. Alchymical receipts. etc. ff.62b-91.