25. ‘File 86/2 VII (C 48) Bahrain Oil’ Date: 1933/1933 Language: English Geographic region: BahrainSitrah
26. ‘File 86/2 VIII (C 49) Bahrain Oil’ Date: 1934/1934 Language: English Geographic region: BahrainSitrah
27. ‘File 86/2 XI (C 53) Bahrain Oil’ Date: 1933/1934 Language: English Geographic region: BahrainSitrah
28. ‘File 86/2 XV (C 86) Bahrain Oil’ Date: 1937/1942 Language: English Geographic region: BahrainSitrah
29. ‘File 86/2 IX (C 50) Bahrain Oil’ Date: 1934/1934 Language: English Geographic region: BahrainSitrah
30. ‘File 86/2 XII (C 54) Bahrain Oil’ Date: 1934/1934 Language: English Geographic region: BahrainSitrah
31. ‘Annex to File 86/2 Bahrain Concession Duplicate’ Date: 1923/1923 Language: English Geographic region: BahrainSitrah
32. PZ 4841/1937 'Persian Gulf: Haji Williamson & Major Holmes' Date: 1937/1938 Language: English Geographic region: BahrainTrucial CoastDibaiKoweit
33. Coll 30/102 'Bahrain Oil Concession: Negotiations between (a) the Iraq Petroleum Coy. and (b) the Standard Oil of California regarding the Bahrain oil concession.' Date: 1934/1945 Language: English Geographic region: Bahrain
34. Coll 30/159 'Ownership of Hawar Islands.' Date: 1936/1942 Language: English Geographic region: Hawar Islands
35. Coll 30/123 'Bahrain (Unallotted Zone) Oil Concession: Negotiations with Petroleum Concessions Ltd.' Date: 1935/1938 Language: English Geographic region: Bahrain
36. Coll 30/123(2) 'Bahrein (Unallotted Zone) Oil Concession: Negotiations with Petroleum Concessions Ltd.' Date: 1938/1939 Language: English Geographic region: Bahrain