1. IOR/R/20/B/1078 Reference (shelfmark): IOR/R/20/B/1078 Title: File C.4/11 1938 Sec. Defence Scheme: Report on Passive Air Defence of Aden by Mr G S Hewitt. Air Raid Commandant for Aden Colony Collection Area: India Office Records and Private Papers Languages: English Date Range: Jan 1939-Jun 1940 Extent: 1 file