25. 'File 12/10 Post Office - Muscat & Gwadur' Date: 1945/1948 Language: English Geographic region: Gwadur
26. 'File 12/3 II RAS-AL-HADD MAIL SERVICE PROPOSAL' Date: 1943/1944 Language: English Geographic region: Ras al Hadd
27. ‘File 16/27 Miscellaneous. Miscellaneous Assistance to Government Officials’ Date: 1920/1954 Language: English
28. 'File 12/3 I MAIL SERVICE - MUSCAT & GWADUR' Date: 1945/1948 Language: English Geographic region: Gwadur
29. ‘File 16/32-II Miscellaneous. Correspondence with the Residency, Bushire.’ Date: 1938/1941 Language: English
30. Vol 134 Secret letters inward Date: 1842/1843 Language: English Geographic region: Trucial CoastKarrack (island)
31. PZ 2246/1932 'Communications between London and the Middle East' Date: 1932/1934 Language: English Geographic region: TeheranSyriaIraq
32. Turkish Arabia Affairs Date: 1844/1844 Language: English Geographic region: SuliemaniahMohammerahMosul
33. Coll 1/34 'Aden. Changes in civil administration in the event of separation from India: printing and sale of stamps' Date: 1933/1937 Language: English
34. Coll 1/43 'Aden. Changes in civil administration in the event of separation from India: Post Office and telephone services' Date: 1933/1937 Language: English
35. Coll 1/72 'Kamaran: postal arrangements' Date: 1937/1937 Language: English Geographic region: KamaranJizan
36. Coll 29/55 'Division of diplomatic and consular expenditure: cost of telegrams and air mail letters' Date: 1929/1938 Language: English