Map produced by the Bahrain Petroleum Company (BAPCO), originally dated 18 May 1939. Shows new information in red (reconnaissance survey, 25-27 May 1939).Shows Bahrein [Bahrain] and coasts of Qatar, and Hasa [Saudi Arabia].A letter from the Political Agent, Bahrain (Hugh Weightman) to the Political Resident in the Persian Gulf (Sir Trenchard Craven William Fowle), on folios 70-74, relates to the map.1 mapMaterials: blueprint on tracing paper, with additions in wash and red ink.Dimensions: 2210 x 940mm, on sheet 2220 x 950mm.