British Library MS. Sloane 3638. Paper. Folio. 188 folios. 16th Century. 1. 'A most excellent book concerning the Philosopher's Stone, written heretofore by a nameless Philosopher'. f.1-30. Translated from a Latin Treatise, printed in the Harmonia Chemico-Philosophica of Johannes Rhenanus, ed. Francofurti, 8vo, 1625. 1st decad. p.179. 2. The 4th, 5th, and 6th Chapters (the rest are spurious) of Guido de Montano de Arte Chymica. ff.31-40. Translated from the Latin Treatise, printed as above. 1st decad. p.125. 3. 'The second epistle of Gratianus concerning the Argent Vives'. ff.40b-49. Translated from the Latin Treatise, printed as above, 2nd Dcad. p.129. 4. 'Collections out of the Exercizes on the Turba of Philosophers in the Ars Aurifera [ed Basil. 1610]. volume the 1st Page 112'. ff.49b-52. 5. 'An usefull Treatise of the Concordance of the Philosophers, written heretofore by a nameless Philosopher'. ff.53-91. Translated from the Latin printed in the Harmonia Chymico Philosophica, edit as above, 1st Decad, p.228. 6. 'Sr Thomas [de Aquino] on the shorter Turba of the Philosophers'. ff.92-128. Translated from the Latin treatise, printed as above, 2nd decad, p.243. 7. 'An unknown concerning the Chymicall Art. But Lucerna Salis, p.62, affirms him to be Marcilius Ficinus, an Italian of the Dukedome of Florence or Tuscany, in the year 1518.' ff.129-188. Translated from the Latin, printed in the Ars Aurifera; Vol I, p.369.