KEYNES, John Maynard, 1st Baron (1883-1946). Autograph letter signed ("JM Keynes'), to Charles Kay Ogden. Firle, Sussex, 6 September 1919. 2 pages, 8vo, creased at folds, 3-inch marginal separation at fold. Keynes writes his friend and fellow Heretic Society member regarding his Cambridge Magazine Bookshop venture. "My dear Ogden, I am not prepared to undertake the duties of arbitrator as you suggest, and I feel that the plan you propose in your letter of the 4th Septr does not provide a workable basis" He continues to outline fundamental conditions for a successful business, including "that the proposed bookshop should be the exclusive bookselling agency outside Cambridge, associated with the Cambridge Magazine"