1. IOR/R/20/B/1388 Reference (shelfmark): IOR/R/20/B/1388 Title: File C.23/228 1940 Con. War: transmission of wireless messages in plain language between Aden and Perim and vice versa Collection Area: India Office Records and Private Papers Languages: English Date Range: Jul 1940-Aug 1940 Extent: 1 file