26. 'File 27/12 IV Draft Trade Report for Kuwait for the year 1920-21' Date: 1921/1921 Language: English
28. 'File 8/21 II MUSCAT STATE AFFAIRS: DEPENDENCIES – SUR (OPERATIONS).' Date: 1932/1934 Language: English Geographic region: SurAiqa
29. 'File 6/7 Mahandal Mekta [Mohanlal Mehta], ex-BI Agent at Dubai' Date: 1932/1933 Language: English Geographic region: Shargah
30. 'File 8/15 MUSCAT STATE AFFAIRS: DEPUTATION OF A CUSTOMS OFFICER TO THE MUSCAT STATE.' Date: 1938/1948 Language: English
33. 'File H/4 Persian Gulf Residency Bushire Office Records. Miscellaneous D/O's' Date: 1905/1917 Language: English
34. 'File H/14 Vol I Turkish Customs on Mainland' Date: 1911/1912 Language: English Geographic region: Al-QatifAl-ʻUqayr
35. Coll 30/76 'Koweit: Abduction to Koweit of two Persian customs guards, by the crew of a Persian dhow.' Date: 1934/1934 Language: English
36. Coll 30/77 'Koweit: Persian interference with Koweiti dhows.' Date: 1934/1948 Language: English Geographic region: KharajQusbehLingahKharg