Catalogue Entry: ALCH00007
'Clavis': detailed directions for a lengthy alchemical operation beginning with the digestion of antimony, iron and sulphur.
Bought at the Sotheby sale by Heffers for £6 and sold to Keynes on 5 September 1936 for £8.5s.
Printed with an English translation in Dobbs, Foundations, 251-5. This was long regarded by Dobbs and many others as probably Newton's own work, but was in fact copied from an unpublished manuscript of George Starkey: see Newman, 'Newton's "Clavis"' (and Dobbs's acknowledgment of the reattribution, Janus Faces, 15).