26. 'Book No 219. From November 1856 and January 1857 To July 1861' Date: 1857/1862 Language: English Geographic region: MuscatZanzibarOman
28. 'Negotiations with Ibn Saud regarding Boundaries of Saudi Arabia' Date: 1950/1950 Language: English Geographic region: MuscatOman
29. 'File 38/15 Oil concessions in Arabia and the Gulf (Muscat)' Date: 1933/1949 Language: English Geographic region: BuraimiSaudi ArabiaRubʻ al KhālīOman
30. 'File 82/1 [I] (F 52) A.P.O.C. and Oil Concessions Arab Coast' Date: 1921/1923 Language: English Geographic region: Bahrain
32. ‘State of affairs between His Highness the Imam of Muscat and the Sohar authorities’ Date: 1852/1852 Language: English Geographic region: Oman
33. ‘Reports of Journeys made into the S.E. Coast of Arabia by some officers of the Surveying Brig “Palinurus”’ Date: 1846/1847 Language: English Geographic region: Ras RouesLesk KairaOmanSoor
34. 'Military Report on the Arabian Shores of the Persian Gulf, Kuwait, Bahrein, Hasa, Qatar, Trucial Oman and Oman' Date: 1933/1933 Language: English Geographic region: BahrainKuwait
35. 'Military Report and Route Book. The Arabian States of the Persian Gulf. 1939' Date: 1940/1940 Language: English Geographic region: QatarBahrein