49. 'Assurances, Undertakings and Agreements, Etc., Made by Certain Chiefs and Khans of Southern Persia with the British Government and Certain British Trading Companies' Contributor: Anglo-Iranian Oil Company Limited (author)William Knox D'Arcy (correspondent) Date: 1926/1926 Language: EnglishPersianFrench Geographic region: Persia Extent: 1 volume (52 folios)
50. 'Books, Periodicals, and Publications' Contributor: Adviser to the Government of Bahrain (correspondent) Date: 1934/1938 Language: EnglishArabicFrench Extent: 1 file (316 folios)
51. 'Selection from Correspondence Relative to the Traffic in Arms in the Persian Gulf, 1897-98. Part I' Date: 1898/1898 Language: EnglishFrench Geographic region: Persian GulfMuscat Extent: 1 file (27 folios)
52. 'Selection from Correspondence Relative to the Traffic in Arms in the Persian Gulf, 1897-98. Part II' Date: 1898/1898 Language: EnglishFrench Geographic region: Persian GulfMuscat Extent: 1 file (26 folios)
53. ‘A collection of treaties, engagements and sanads relating to India and neighbouring countries’ Contributor: Sir Knight Charles Umpherston Aitchison (author) Date: 1933/1933 Language: EnglishFrench Geographic region: PersiaAfghanistan Extent: 1 volume (289 folios)
54. 'Memorandum respecting Current Events in Persia for the Years 1906 and 1907' Contributor: Secretary of State for Foreign Affairs (correspondent)HM Ambassador to Russia (correspondent)Minister of Foreign Affairs (correspondent) Date: 1907/1907 Language: EnglishFrench Geographic region: Persia Extent: 1 file (34 folios)
55. 'Memorandum on Bahrein' Date: 1947/1947 Language: EnglishFrench Geographic region: Bahrain islands Extent: 1 file (31 folios)
56. 'Note on the Turkish Fort at Fao on the Shat-el-Arab. (With Sketch Map of the Shat-el-Arab.) 1883 to 1897.' Date: 1897/1897 Language: EnglishFrench Geographic region: Shat-el-ArabFao Extent: 1 file (9 folios)
57. 'Memorandum on Persian Railways' Date: 1911/1911 Language: EnglishFrench Geographic region: SeistanPersia Extent: 1 file (42 folios)
58. 'Memorandum on Sheikh Said' Contributor: Political Resident, Aden (correspondent)India Office, Assistant Secretary to the Political and Secret Department, (correspondent)Assistant Resident, Perim (correspondent) Date: 1893/1893 Language: EnglishFrench Geographic region: Sheikh Said Extent: 1 file (3 folios)
59. 'Correspondence respecting the occupation of Merv by Russia and her proceedings on the Khorassan Frontier of Persia.' Contributor: Secretary of State for Foreign Affairs (correspondent)Ambassador of the Russian Federation to the United Kingdom (correspondent) Date: 1884/1884 Language: EnglishFrench Geographic region: KhorasanSarakhsMerv Extent: 1 file (13 folios)
60. 'Correspondence relating to the Italian Occupation of Assab Bay.' Contributor: First Assistant Resident, Aden (author) Date: 1880/1880 Language: EnglishFrench Geographic region: Assab Bay Extent: 1 file (17 folios)