49. Letter to Thuwaini bin Said, Sultan of Muscat from an undisclosed author (Lewis Pelly?) Date: 1862/1866 Language: Arabic Extent: 2 folios
50. Native Letters Outward Date: 1863/1865 Language: EnglishArabicPersian Extent: 1 volume (142 folios)
51. '34 File 666 Threatened invasion of Oman by Ibn Rashid' Contributor: Sultan of Muscat and Oman, Āl Bū Sa'īd Dynasty (correspondent)Native Agent, Bahrain (correspondent)Political Agent and Consul, Muscat (correspondent)Native Agent, Trucial Coast, Sharjah (correspondent)Foreign Office (correspondent)HM Ambassador to Iran (correspondent)HM Ambassador to the Ottoman Empire (correspondent)Political Agent, Turkish Arabia (correspondent) Date: 1888/1889 Language: EnglishArabic Geographic region: OmanTrucial CoastNajdEl Bida Extent: 1 volume (244 folios)
52. Letter from Syed Majid [Sayyid Majid bin Said Al-Busaid] addressed, via Colonel Lewis Pelly, to Ameer Abdullah [Adbullah bin Faisal bin Turki al-Saud] Date: 1869/1871 Language: ArabicEnglish Extent: 3 folios
53. Letter no.18 to Lieutenant-Colonel Sir Ephraim Gerrish Stannus, Resident in the Persian Gulf, from William Newnham, Chief Secretary, Government of Bombay Date: 1825/1825 Language: EnglishArabic Extent: 5 folios
54. Letter from Major Charles Grant, 1 Assistant Resident to Lieutenant-Colonel Edward Charles Ross, Political Resident in the Persian Gulf, Bushire Date: 1874/1874 Language: EnglishArabic Extent: 2 folios
55. ‘26 File 626 Qatar and Bahrain affairs: action of Shaikh Jasim ibn Muhammad Al Thani against al-`Udaid’ Contributor: Native Agent, Trucial Coast, Sharjah (correspondent)Emir of Qatar (correspondent)Emir of Abu Dhabi, Āl Nahyān dynasty (correspondent) Date: 1881/1886 Language: EnglishArabic Geographic region: Al-HasaQatarAbu DhabiEl Katiff Extent: 1 volume (221 folios)
56. Letter from Nicholas Hankey Smith, Resident at Bushire to [Ja‘afar ‘Alī Khān] Date: 1808/1808 Language: EnglishArabic Extent: 2 folios
57. Letter from Shaikh Zayid ben Khalifeh [Zayid I bin Khalifa Al Nahyan], Chief of Aboothabee [Abu Dhabi] to Lieutenant Colonel Lewis Pelly, HBM's Political Resident Persian Gulf, Bushire Date: 1870/1870 Language: ArabicEnglish Extent: 2 folios
58. 'Book No 253' Contributor: Assistant to the Political Resident in the Persian Gulf (correspondent)Native Agent, Bahrain (correspondent)Political Agent, Turkish Arabia (correspondent)Shaikh of Demaum (correspondent)King of Bahrain (correspondent) Date: 1857/1862 Language: EnglishArabic Geographic region: BassidoreDemaumBahrein Extent: 1 volume (226 folios)
59. ‘Vol 37, 38, 40 Letters inward and outward’ Contributor: Government of Bombay, Civil Auditor (correspondent)HM Chargé d'Affaires to Persia (correspondent)Government of Bombay, Persian Secretary (correspondent)Senior Naval Officer in the Persian Gulf (correspondent)Political Agent, Turkish Arabia (correspondent)Shaikh Shaikh of the Āl Jalāhimah tribe Raḥmah bin Jābir Āl Jalāhimah (recipient) Date: 1825/1825 Language: EnglishArabic Geographic region: BussoraPirate Coast Extent: 1 volume, 59 items (92 folios)
60. '33 File 665 Hostilities between Shaikh Zaid and Shaikh Jasim' Contributor: Political Agent and Consul, Muscat (correspondent)Native Agent, Trucial Coast, Sharjah (correspondent)Foreign Office (correspondent)Emir of Qatar (correspondent)Emir of Abu Dhabi, Āl Nahyān dynasty (correspondent) Date: 1888/1890 Language: EnglishArabic Geographic region: QatarAbu DhabiAl BiddaOdaid Extent: 3 volumes (404 folios)