1. ‘Miscellaneous 16/4 Correspondence with – the Mespers, Bahrain, etc.’ Date: 1926/1943 Language: English Geographic region: Persian Gulf
3. ‘File 13/3 BOAC [British Overseas Airways Corporation] services’ Date: 1932/1950 Language: English Geographic region: Muharraq Aerodrome
4. ‘File 16/50 Correspondence with Messrs Gray, Mackenzie & Co., Ltd.’ Date: 1937/1949 Language: English