1. '86/12-III CONFIDENTIAL A. 85 P.C.L. MUSCAT' Contributor: India Office (correspondent)Political Agent, Bahrain (correspondent)Sultan of Muscat and Oman, Āl Bū Sa'īd Dynasty (correspondent)Petroleum Development Oman (correspondent)Political Agent and Consul, Muscat (correspondent) Date: 1937/1944 Language: EnglishArabic Geographic region: OmanMuscatDhofar Extent: 1 volume (278 folios)
2. '86/21 - II P.C.L. Exploration of Trucial Hinterland. B 51' Contributor: Petroleum Concessions Limited (correspondent)Political Agent, Bahrain (correspondent)Native Agent, Trucial Coast, Sharjah (correspondent)Sultan of Muscat and Oman, Āl Bū Sa'īd Dynasty (correspondent)Assistant Political Agent, Bahrain (correspondent)Political Agent and Consul, Muscat (correspondent) Date: 1938/1938 Language: English Geographic region: BaraimiJebel HafitMuscatJebel Faiyah Extent: 1 file (142 folios)
3. '86/21 - III B.65. Trucial Hinterland Exploration' Contributor: Petroleum Concessions Limited (correspondent)Abu Dhabi Company for Onshore Oil Operations (correspondent)Political Agent, Bahrain (correspondent)Sultan of Muscat and Oman, Āl Bū Sa'īd Dynasty (correspondent)Political Agent and Consul, Muscat (correspondent) Date: 1939/1945 Language: English Geographic region: BaraimiJebel HafitMuscatJebel Faiyah Extent: 1 file (126 folios)
4. 'B. 56. Confidential 86/14 - v. BAHRAIN UNALLOTED AREA.' Contributor: India Office (correspondent)Petroleum Concessions Limited (correspondent)Political Agent, Bahrain (correspondent)Indian Political Service, Secretary to the External Affairs Department (correspondent)King of Bahrain (correspondent) Date: 1939/1939 Language: EnglishArabic Geographic region: Hawar IslandsBahrain Extent: 1 volume (251 folios)
5. 'C-85. 86/30 - I WIRELESS COMMUNICATION BETWEEN BAHRAIN AND SAUDI ARABIA' Contributor: India Office (correspondent)Political Agent, Bahrain (correspondent)Cable and Wireless Ltd (correspondent)Commonwealth Telecommunications Board (correspondent)Senior Naval Officer in the Persian Gulf (correspondent)Arabian American Oil Company (correspondent) Date: 1938/1942 Language: English Geographic region: ʻAwālīDhahran Extent: 1 volume (195 folios)
6. 'C.74 CONFIDENTIAL 86/4 EASTERN AND GENERAL SYNDICATE. QATAR.' Contributor: Political Agent, Bahrain (correspondent) Date: 1932/1933 Language: English Geographic region: Qatar Extent: 1 volume (23 folios)
7. 'F 83 File 82/27-II QATAR OIL' Contributor: Foreign Office (correspondent)Political Agent, Bahrain (correspondent) Date: 1934/1934 Language: English Extent: 1 volume (310 folios)
8. 'F-82 82/27 I: QATAR OIL' Contributor: Political Agent, Bahrain (correspondent)Colonial Office (correspondent)Secretary of State for the Colonies, United Kingdom (correspondent)Emir of Qatar (correspondent) Date: 1925/1934 Language: EnglishArabic Geographic region: Trucial States Extent: 1 volume (361 folios)
9. 'F.85 File 82/27-IV Qatar Oil' Contributor: Foreign Office (correspondent)Political Agent, Bahrain (correspondent)Emir of Qatar (correspondent) Date: 1934/1934 Language: English Extent: 1 volume (207 folios)
10. 'Vol-B.44. Confidential 86/7-vii. P.C.L. TRUCIAL COAST' Contributor: India Office (correspondent)Petroleum Concessions Limited (correspondent)Political Agent, Bahrain (correspondent)Native Agent, Trucial Coast, Sharjah (correspondent) Date: 1937/1937 Language: EnglishArabicPersian Geographic region: Sharjah Extent: 1 volume (198 folios)
11. 'VOL. B. 60. CONFIDENTIAL 86/14 - vi. BAHRAIN UNALLOTTED AREA.' Contributor: Admiralty (correspondent)Air Officer Commanding, Iraq (correspondent)India Office (correspondent)Petroleum Concessions Limited (correspondent)Political Agent, Bahrain (correspondent)King of Bahrain (correspondent) Date: 1939/1941 Language: EnglishArabic Geographic region: Fasht DibalHawar IslandsZakhnuniya IslandBahrain Extent: 1 volume (229 folios)
12. 'File 26/133 (F 78) Khor Musa' Contributor: Foreign Office (correspondent)Political Agent, Bahrain (correspondent)Indian Navy, Commander-in-Chief (correspondent)Anglo-Iranian Oil Company Limited (correspondent)Commander of HMIS Lawrence (correspondent)Commander of RIMS Palinurus (correspondent) Date: 1913/1924 Language: EnglishArabic Geographic region: Khor Musa Extent: 1 volume (116 folios)
