British Library MS. Sloane 3636. Paper. Quarto. 203 folios. 17th Century. The name of John Nowell is written on the flyleaf. 7. A declaration of the secret of making gold; in the form of a lette, inscribed 'To my loving cozen and son the tere Hermetik Philosopher T.H.U.O. ff.100-114. Begins: Dear loveing cozen and son, tho I had resolved never to give in writing to any person the secret of the ancient sages-' Ends: 'Allso I have subscribed this testament with my blood, the last day of my life on my death bed - Actum Leyden, 27 of March, 1672'. Signed at the end 'T.G.M.' 8. Various alchemical processes. ff.116-128. 9. 'A singular treatise of Bernhard Count Trevisan, concerning the Philosophers' Stone'. ff.131-134. Begins: 'Considering the long desires and hopes of the students in the Chymick Art, I will in the present tractate breifly and openly declare this Art'. 12. Various alchemical processes. ff.153-166.