Correspondents include: F A Lindemann [later 1st Lord Cherwell] on LSA's ideas for holding Imperial War Cabinet meetings by wireless telephone or television [conference calls] and bomb disposal (2); Bernard Sendall, Admiralty; Major Ernest Belcher on improving fuel consumption in naval engines (6); Geoffrey Shakespeare [Parliamentary and Financial Secretary to the Admiralty] (2); Geoffrey Geoffrey-Lloyd, Secretary for Mines; John Postlethwaite; Ashley Brown on problems with billeting evacuees; 1st Lord Hankey, Paymaster-General (2); Colin Thornley, Principal Private Secretary to Secretary of State for the Colonies; [George] David Roseway [Private Secretary to the Secretary of State for War] (2); A V Alexander, First Lord of the Admiralty; Charles Wright, Director of Scientific Research, Admiralty, on LSA idea for a desert craft used on land and in the air (3); Edward Salt on the Food Defence Fish Emergency Scheme (or the problem of fish supplies for Birmingham [Warwickshire]); Sir Archibald Sinclair [Secretary of State for Air, later 1st Lord Thurso] (2); George Finch [Professor of Applied Physical Chemistry, University of London] on his ideas for bomb design; Sydney Chapman [Professor of Natural Philosophy, University of London] on Finch's ideas for bomb design; Lionel James on reviving King Edward's Horse (oversea dominions' regiment) (2); Oliver Stanley, Secretary of State for War, on King Edward's Horse; Ralph Furse [Director of Recruitment, Colonial Service] on King Edward's Horse (5); 1st Lord Horne; James McGregor [Private Secretary to the Secretary of State for War]; Vernon Bovenizer [Assistant Private Secretary to the Secretary of State for War]; Paul Waller on anti-aircraft defences (5); Henry Wooldridge, Department of Scientific and Industrial Research; William Elliot, Assistant Secretary to the War Cabinet (2).

Also includes: papers on Ernest Belcher's Plomien Fuel Economiser; notes by Sydney Chapman on George Finch's bomb designs; notes by Lionel James on reviving King Edward's Horse.