Correspondents include: Under-Secretary of State for Air, 7th Lord Londonderry [earlier Lord Castlereagh] (4); Francis Bertram, Secretary to the Cross-Channel Subsidies Committee; George Holt-Thoams; John Moore-Brabazon [later 1st Lord Brabazon].Also includes copies of letters, telegrams and minutes from WSC to some of those mentioned above and to Jack Scott [Air Secretary and Private Secretary to WSC], Austen Chamberlain [Chancellor of the Exchequer], Chief of the Air Staff [Air-Marshal Sir Hugh Trenchard], Controller-General of Civil Aviation [Major-General Sir Frederick Sykes], and Frederick Guest [Secretary of State for Air from 1 April 1921]; a copy of the interim report of the Cross-Channel Subsidies Committee.Subjects include: airships; WSC continuing as Secretary of State for Air; air estimates; arrangements for WSC's absence at the Cairo [Egypt] Conference; the aircraft industry; the cross-channel air service; subsidising civil aviation.