British Library MS. Sloane 3639. Paper. Folio. 134 folios. 17th Century. 1.'The Second Supplement to the Subterranean Naturall Philosophy; that is, A Philosophicall Demonstration or Chymicall Thesis of John Joachim Becher of Spire, doctour of Physick and Counsellour of his sacred Imperiall Majesty; showing the truth and possibility of the Transmutation of Metalls. To Leopold the most invincible Emperour of the Romans'. With a table of contents. ff.1-62. It begins with the third section of the 'Praliminaria', and in printed in latin, with the 'Physica Subterranea' of the author, ed in 8vo, Lipsiae, 1703, p. 689. 2. 'The Natural round Physick (or Philosophy) of the Chemicall Cabalisticall Vision' - a translation. ff.63-93. Begins: 'The Sun and Moon with all the firmament appear'd first: they stood still: a colour indeed they had, but gave no light'. Ends:'Which Husband and Wife united by this indissoluble chain are enriched with an innumerable Progeny. Amen'. 3. Translation of the fourth chapter, 'Of the Mountain of Venus', of a Latin Alchemical Treatise. ff.94-105. Begins: 'Among the metalls which God would have the most serviceable for human use, Venus is the most excellent'. 4. 'An admonition, an instruction and proof against all those who falsely perswade and propose both to themselves and to others to prepare for them in a short space of time an aurum potabile, without the process and tincture of the universall Philosophicall Stone: described briefly by a student in the Sophick labour, for the sake of the sons of Learning': translated from the German. ff. 106-114. The Preface to the Reader begins: 'Since the very thing itself does speak, that in the extreme old age of this world'. The first chapter begins: 'Of the choice of the Gold: It appears out of the Adept Philosophy and the treasure of Nature, that there is in the world gold of a threefold kind'. 5. Two answers of F.R.C. (that is, of the Brothers of the Rosy Crosses) to some clients of theirs. ff.114b-117. Begins: 'The first answer. Every one naturally desires treasures of gold, silver, precious stones and riches'. 6. The Second Part, entitled, The Lilly among the Thorns, of the Arca Arcani artificiosissime de summis naturae mysteriis, compiled from the Rusticus major et minor of Johannes Grasseus, sive Chortalasseus. ff.118-126. Translated from the Latin, printed in the Theatrum Chemicum, Vol. VI, p.323. 7. 'The Practick of the authour, John Grasseus, Doctour of the Laws, and Syndick of Stralsund, who called himself Chortalessaeus'. ff.126b-134. Colophon: 'The end of the lesser Country-man'. Translated from the Latin printed as above, p.333.