37. 'The main pass, Aden.' By Sir Henry Yule (1820-1899) Date: 1844/1844 Language: English Geographic region: Aden
38. 'Restrictions on the trade in arms, &c., on the Red Sea and on the Somali Coasts' Date: 1887/1887 Language: English Geographic region: AdenRed SeaSomali Coast
39. ‘Book 161 1847’ Vol 161 Letters inward Date: 1847/1847 Language: English Geographic region: AdenEastern Africa
40. 'Volume II. MEMORANDA REGARDING OTHER EXTERNAL AFFAIRS. 1905.' Date: 1905/1905 Language: English Geographic region: AdenPersian Gulf
41. 'British protectorate over the Arabian coast from Shaikh Said to Oman (Muscat)' Creator: Author: India Office, Assistant Secretary to the Political and Secret Department, Date: 1887/1887 Language: English Geographic region: AdenMuscatHadramaut Coast
42. 'British interests in Arabia' Creator: Author: India Office, Secretary to the Political and Secret Department Date: 1917/1917 Language: English Geographic region: AdenArabiaTurkey
43. 'Egyptian Claims to Sovereignty over the Somali Coast.' Date: 1876/1879 Language: English Geographic region: BerberaAden
44. 'The North Pass of Aden or Baab el Yemen. Inside' by Stafford Bettesworth Haines Date: 1839/1854 Language: English Geographic region: Aden
46. ‘Capt C. at Marshag. May 22nd 71’ Date: 1871/1871 Language: English Geographic region: عدنآسيا الوسطىآفاالبنغالبومبايالبرازيلبورماكندا
47. 'Present political situation in our hinterland and beyond the border' Date: 1916/1916 Language: English Geographic region: Aden
48. ‘State of affairs in the Bagdad Pachalie’ Date: 1848/1848 Language: English Geographic region: BagdadBussorah