50. ‘File 16/5 Bahrain Agency: fortnightly political diaries’ Date: 1930/1931 Language: English Geographic region: QatifNejdQatar
51. ‘File 16/9 II Id Calls and letters of greetings etc’ Date: 1933/1936 Language: Arabic Geographic region: Manama
52. 'File 19/191 II (C 38) Bahrain, Persian Claim To' Date: 1929/1931 Language: English Geographic region: BahrainBūshehr
53. 'File 19/212 I (C 41) Bahrain Transit Trade' Date: 1931/1932 Language: English Geographic region: BahrainBūshehr
56. 'File 6/65 Correspondence regarding Grant of Succession Certificate to H. E. Shaikh Hamad bin 'Isa-al-Khalifah C. S. I.' Date: 1933/1942 Language: English
57. 'File 6/67 Salutes to the Ruler of Bahrain and Chiefs and notables' Date: 1934/1934 Language: English
58. 'File 19/109 II (C 17) Bahrain: Relations of Chief with other Foreign Powers' Date: 1913/1922 Language: English Geographic region: ZubarahAl-Hasa
59. 'File 19/191 III (C 56) Bahrain, Persian Claim To' Date: 1932/1935 Language: English Geographic region: BahrainBūshehr
60. 'File 19/126 Bahrain Customs' Date: 1930/1930 Language: English Geographic region: BahrainBūshehr