49. 'File 11/12 VII Muscat Intelligence Summary' Contributor: Political Resident, Persian Gulf (correspondent) Date: 1950/1951 Language: English Geographic region: Oman Extent: 1 file (33 folios)
50. 'File 14/1 PCL termination of Dhufar concession' Contributor: Sultan of Muscat and Oman, Āl Bū Sa'īd Dynasty (correspondent)Political Resident, Persian Gulf (correspondent)Petroleum Development Oman (correspondent) Date: 1950/1951 Language: English Geographic region: OmanDhofar Extent: 1 file (4 folios)
51. 'File 2/40 V AIR FACILITIES & AIR AGREEMENT.' Date: 1951/1951 Language: English Extent: 1 file (1 folio)
52. 'File 2/21- Vol III. BAIT AL FALAG (MUSCAT) LANDING GROUND.’ Date: 1951/1951 Language: English Extent: 1 file (2 folios)
53. 'File 9/5 II R. N. Facilities in Sultanate: Khor Kuwai; (ii) Little Quoin Islands' Contributor: Minister for Foreign Affairs (correspondent) Date: 1951/1951 Language: English Geographic region: Khor Kuwai Extent: 1 file (24 folios)
54. 'File 8/62 IV PRINCIPAL SHAIKHS & TRIBES OF OMAN.' Contributor: Foreign Office Research Department (author; correspondent)Political Resident, Persian Gulf (correspondent) Date: 1950/1951 Language: English Geographic region: Oman Extent: 1 file (137 folios)
55. 'File 8/65 IX RENEWAL of COMMERCIAL TREATY' Contributor: Political Resident, Persian Gulf (correspondent)Foreign Office (correspondent) Date: 1951/1951 Language: EnglishArabic Extent: 1 file (119 folios)
56. 'File 8/16 IV DIRECTOR GENERAL OF CUSTOMS MUSCAT' Contributor: Government of Muscat and Oman, Director-General of Customs (correspondent)Sultan of Muscat and Oman, Āl Bū Sa'īd Dynasty (correspondent)Ministry of Foreign Affairs (correspondent) Date: 1940/1951 Language: English Extent: 1 file (23 folios)
57. 'File 8/65 VIII RENEWAL of COMMERCIAL TREATY.' Contributor: Political Resident, Persian Gulf (correspondent)Foreign Office (correspondent)Sultan of Muscat and Oman, Āl Bū Sa'īd Dynasty (correspondent) Date: 1950/1951 Language: English Extent: 1 file (122 folios)
58. 'File 8/85 IV MINISTER for FOREIGN AFFAIRS MUSCAT' Contributor: Basil Woods Ballard (correspondent; subject)Minister for Foreign Affairs (correspondent)Political Resident, Persian Gulf (correspondent) Date: 1950/1951 Language: English Extent: 1 file (20 folios)
59. 'File 8/90 III ECONOMIC AGRICULTURAL & INDUSTRIAL DEVELOPMENT IN MUSCAT TERRITORY.' Contributor: Cyril Sankey Fox (correspondent)Director of Agriculture (author)Political Resident, Persian Gulf (correspondent)Foreign Office (correspondent) Date: 1950/1951 Language: English Geographic region: Batinah Coast Extent: 1 file (66 folios)
60. 'File 8/64 III SULTAN'S RELATIONS WITH HIS TRIBES' Contributor: Political Resident, Persian Gulf (correspondent)Foreign Office, Eastern Department (correspondent)Bahrain Political Agency (correspondent)Political Agent, Trucial Coast (correspondent) Date: 1951/1951 Language: EnglishArabic Geographic region: Oman Extent: 1 file (73 folios)