37. 'File 19/191 I (C 27) Bahrain, Persian Claim To' Contributor: James Orton (correspondent)Francis Warden (correspondent)Hugh Weightman (correspondent) Date: 1927/1928 Language: EnglishArabicFrench Geographic region: BahrainBūshehr Extent: 1 volume (235 folios)
38. 'File 21/20 Airways, Private Aviators' Contributor: Foreign Office (correspondent)French Embassy, London (correspondent)Political Resident, Persian Gulf (correspondent)British Embassy in Iraq, Baghdad (correspondent)Air Officer Commanding, Iraq (correspondent)Shaikh Hakim of Bahrain Ḥamad bin 'Īsá Āl Khalīfah (correspondent) Date: 1932/1939 Language: EnglishFrenchArabic Geographic region: Persian Gulf Extent: 1 volume (142 folios)
39. ‘File 29/18i I Food Supplies – TEA & COFFEE’ Contributor: Adviser to the Government of Bahrain (correspondent)Government of Bahrain, Food Controller (correspondent) Date: 1940/1944 Language: EnglishFrenchArabic Extent: 1 file (372 folios)
40. 'File 29/28 British Industrial Fair' Date: 1934/1950 Language: EnglishArabicFrenchSpanishPortuguese Geographic region: London Extent: 1 file (256 folios)
41. 'File 53/6 (D 2) Koweit [Kuwait] Affairs, 1898-1899' Date: 1898/1899 Language: EnglishFrenchArabic Extent: 1 volume (280 folios)
42. 'File 53/7 VI (D 9) Koweit [Kuwait] affairs - Arab Tribes, 1907-1911' Date: 1907/1911 Language: EnglishFrenchArabic Extent: 1 file (335 folios)
43. 'File 73/7 IV (D 25) Anglo-Turkish Negotiations' Contributor: Emir of Mohammerah (correspondent)Political Agent, Bahrain (correspondent)Emir of Qatar (correspondent) Date: 1913/1913 Language: EnglishFrenchArabic Extent: 1 file (42 folios)
44. 'File V/11 Clearance Papers for Sailing Craft Leaving Bahrain' Contributor: Bahrain Political Agency (creator)Political Agent, Bahrain (creator) Date: 1916/1917 Language: EnglishFrenchArabicPersian Geographic region: Tangestān Extent: 1 file (76 folios)
45. 'File VIII/3. Pedigree, Private affairs, notes, etc on the As-Subah family.' Contributor: Shaikh Hakim of Kuwait Aḥmad al-Jābir Āl Ṣabāḥ (correspondent) Date: 1904/1922 Language: EnglishArabicFrench Geographic region: Jazīrat WarbahBubiyan IslandMohammerahShat-el-Arab Extent: 1 volume (228 folios)
46. 'File VIII/6 Death of Shaikh Jabir and Accession of Shaikh Salim' Contributor: Shaikh Hakim of Kuwait Sālim al-Mubārak Āl Ṣabāḥ (correspondent) Date: 1917/1917 Language: EnglishArabicFrench Extent: 1 file (67 folios)
47. 'File W/4 Hostilities in Persia: Tangistan Blockade; Confiscation of Tea for Tangistan' Contributor: Qāḍī of Bahrain (correspondent)King of Bahrain (correspondent)Bahrain Political Agency (creator)Political Agent, Bahrain (creator)Wilhelm Wassmuss (correspondent)Ra'is Ali Dalvari (correspondent)Qashqai (Tribe) (correspondent)Tangsiri (Tribe) (correspondent) Date: 1915/1918 Language: EnglishFrenchArabicPersian Extent: 1 file (203 folios)
48. 'File XVIII/2 COAL, MINING RIGHTS AND MONOPOLIES Expedition to the neighbourhood of Sur, 1901.' Date: 1900/1902 Language: EnglishArabicFrench Geographic region: Sur Extent: 1 volume (159 folios)