Catalogue Entry: ALCH00010
'The method of ye work': a commentary on [A.T. Limojon, Sieur de] Didier's 'Six Keys' (early 1690s?).
Bought at the Sotheby sale by Maggs Brothers for £15.10 and sold to Keynes on 13 August 1936 for the sale price plus 20%.
Keynes Ms. 23 is a Latin translation of the French original of Didier's work. See Dobbs, Janus Faces, 180-81, and Westfall, Never at Rest, 529. Westfall argues that this manuscript and Keynes Ms. 53 represent the first steps, taken in the early 1690s, that led ultimately to the major essay 'Praxis' (Babson Ms. 420).