51. IOR/R/20/E/80 Reference (shelfmark): IOR/R/20/E/80 Title: Vol I No 3 File 3 Aden affairs [Secret] Collection Area: India Office Records and Private Papers Languages: English Date Range: Jan 1869-Nov 1869 Extent: 1 volume
52. IOR/R/20/E/248 Reference (shelfmark): IOR/R/20/E/248 Title: Vol I No 3 File 89 Aden Boundary Commission Collection Area: India Office Records and Private Papers Languages: English Date Range: Jan 1904-Jan 1905 Extent: 1 volume
53. IOR/R/20/E/306 Reference (shelfmark): IOR/R/20/E/306 Title: File 669-1 Administration of Aden: proposed transfer to the Colonial Office Collection Area: India Office Records and Private Papers Languages: English Date Range: Dec 1918-Nov 1922 Extent: 1 volume
54. IOR/R/20/E/307 Reference (shelfmark): IOR/R/20/E/307 Title: File 669-11 Administration of Aden: proposed transfer of the Colonial Office Collection Area: India Office Records and Private Papers Languages: English Date Range: Dec 1922-May 1927 Extent: 1 volume
55. IOR/R/20/E/317 Reference (shelfmark): IOR/R/20/E/317 Title: File 8506 Aden administration: India Office memorandum on Aden and its administration [B424] Collection Area: India Office Records and Private Papers Languages: English Date Range: Aug 1931-Oct 1931 Extent: 1 volume
56. IOR/R/20/E/20, Item 1 Reference (shelfmark): IOR/R/20/E/20, Item 1 Title: File 195 Aden fortifications: ordinance required Collection Area: India Office Records and Private Papers Languages: English Date Range: Jul 1842 Extent: 1 part volume
57. IOR/R/20/E/56, Item 1 Reference (shelfmark): IOR/R/20/E/56, Item 1 Title: Vol 2 No 4 File 52 Perim [Secret] Collection Area: India Office Records and Private Papers Languages: English Date Range: Feb 1858-Dec 1858 Extent: 1 part volume
58. IOR/R/20/E/135, Item 1 Reference (shelfmark): IOR/R/20/E/135, Item 1 Title: Vol VII No 9 File 5 Sheikh Othman Collection Area: India Office Records and Private Papers Languages: English Date Range: Dec 1881-Oct 1882 Extent: 1 part volume
59. IOR/R/20/E/213, Item 1 Reference (shelfmark): IOR/R/20/E/213, Item 1 Title: Vol VI No 8 File 975 Yemen: affairs Collection Area: India Office Records and Private Papers Languages: English Date Range: Aug 1898-Nov 1898 Extent: 1 part volume
60. IOR/R/20/E/223, Item 1 Reference (shelfmark): IOR/R/20/E/223, Item 1 Title: Vol VI No 8 File 1009 Yemen affairs Collection Area: India Office Records and Private Papers Languages: English Date Range: Dec 1899-Aug 1900 Extent: 1 part volume