Includes notes, memoranda and correspondence by and from Group Captain Lachlan Maclean, including: Maclean on subjects including his decision to resign from the RAF, and a memorandum by Maclean on the parity of Air Forces; Bomber Command training report, 1937, by Air Chief Marshal Sir Edgar Ludlow-Hewitt, Air Officer Commanding-in-Chief, Bomber Command; notes on Air Estimates; diagram of the peace time organization of the RAF; Sir Kingsley Wood, Secretary of State for Air, on Maclean's resignation.Also includes: copy of a letter from WSC to Sir Kingsley Wood on Maclean.