Correspondents include: General Sir William Robertson, General Officer Commanding-in-Chief the Forces in Great Britain (2); Sir Arthur Duckham; Brigadier-General William Alexander, Controller of Aircraft Supply and Production; Brigadier-General [John Steel], Director of Air Division, Admiralty; General Sir Henry Wilson, Chief of Imperial General Staff; Major-General Frederick Sykes, Chief of the Air Staff [until February 1919] (2); Major-General John Seely [later 1st Lord Mottistone, Under-Secretary of State for Air]; Major-General Sir Hugh Trenchard, Chief of the Air Staff [from February 1919] (2); 7th Lord Londonderry [earlier Lord Castlereagh].Also includes copy letter from WSC to Walter Long [First Lord of the Admiralty], and War and Air memoranda, notes, and minutes.Subjects include: air strength; the air defence of Great Britain; the reorganisation of the Air Ministry and the Air Council; aircraft production; the future development of aviation; relations and co-operation between the services; changes to air force ranks; appointments to and the constitution of the Air Council; the role of civil aviation.Also includes: RAF statistics; conference and commission papers; diagrams of the structure of the Air Ministry.