1. 'Arms Traffic in Persian Gulf. Supply of information by exporters to the Custom authorities' Contributor: Permanent Under-Secretary of State for India (recipient)Board of Customs, Secretary (correspondent) Date: 1899/1899 Language: English Extent: 1 file (3 folios)
2. 'File 35/87 VI A. 38 Muscat reforms, customs, finances' Contributor: Financial Advisor to the Sultan of Muscat (correspondent) Date: 1924/1927 Language: EnglishArabic Extent: 1 volume (217 folios)
3. 'File 35/134 III (A 54) Sur: Ja`alan- Amirs of.' Contributor: Emir of Ja'alān (correspondent) Date: 1930/1931 Language: EnglishArabic Geographic region: Sur Extent: 1 volume (203 folios)
4. 'File 35/134 IV (A 56) Sur. Ja'alan - Amirs of.' Contributor: Emir of Ja'alān (correspondent) Date: 1931/1932 Language: English Geographic region: AiqaSur Extent: 1 volume (253 folios)
5. 'File 53/83 II (D 105) Smuggling Between 'Iraq + Kuwait' Date: 1934/1934 Language: EnglishArabicFrench Extent: 1 volume (246 folios)
6. 'File 53/83 III (D 113) Kuwait-Iraq Smuggling' Date: 1934/1935 Language: EnglishArabic Extent: 1 volume (235 folios)
7. 'File 53/83 IV (D 123) Kuwait-Iraq Smuggling' Date: 1935/1936 Language: EnglishArabic Extent: 1 volume (264 folios)
8. 'File 53/83 IX (D 176) Kuwait Iraq Smuggling' Date: 1941/1946 Language: EnglishArabic Extent: 1 volume (256 folios)
9. 'File 53/83 V (D 126) Kuwait-Iraq Smuggling' Date: 1936/1937 Language: English Extent: 1 volume (204 folios)
10. 'File 53/83 VI (D 135) Kuwait-Iraq Smuggling' Date: 1937/1937 Language: English Extent: 1 volume (213 folios)
11. 'File 53/83 VII (D 147) Kuwait Iraq Smuggling' Date: 1938/1939 Language: EnglishArabic Extent: 1 volume (253 folios)
12. 'File 53/83 VIII (D 153) Kuwait-Iraq Smuggling' Date: 1939/1940 Language: EnglishArabicFrench Extent: 1 volume (225 folios)