11. IOR/R/20/A/4387-4388 Reference (shelfmark): IOR/R/20/A/4387-4388 Title: Aden Municipality Collection Area: India Office Records and Private Papers Languages: English Date Range: 1891-1893 Extent: 2 files
12. IOR/R/20/A/4508-4516 Reference (shelfmark): IOR/R/20/A/4508-4516 Title: Aden Settlement Collection Area: India Office Records and Private Papers Languages: English Date Range: 1907-1942 Extent: 9 files
13. IOR/R/20/A/5034-5043 Reference (shelfmark): IOR/R/20/A/5034-5043 Title: Miscellaneous records Collection Area: India Office Records and Private Papers Languages: English Date Range: 1905-1939 Extent: 10 files
14. IOR/R/20/A/4885-4906 Reference (shelfmark): IOR/R/20/A/4885-4906 Title: Yemen files Collection Area: India Office Records and Private Papers Languages: English Date Range: 1904-1938 Extent: 22 files
15. IOR/R/20/A/4907-4921 Reference (shelfmark): IOR/R/20/A/4907-4921 Title: Idrisi files Collection Area: India Office Records and Private Papers Languages: English Date Range: 1916-1924 Extent: 15 files
16. IOR/R/20/A/4922-4935 Reference (shelfmark): IOR/R/20/A/4922-4935 Title: Hodeida files Collection Area: India Office Records and Private Papers Languages: English Date Range: 1918-1937 Extent: 14 files
17. IOR/R/20/A/1-1059 Reference (shelfmark): IOR/R/20/A/1-1059 Title: General Compilation volumes Collection Area: India Office Records and Private Papers Languages: English Date Range: 1838-1905 Extent: 1058 volumes
18. IOR/R/20/A/1171-1221 Reference (shelfmark): IOR/R/20/A/1171-1221 Title: Confidential Branch files Collection Area: India Office Records and Private Papers Languages: English Date Range: 1887-1905 Extent: 51 files
19. IOR/R/20/A/1571-2922 Reference (shelfmark): IOR/R/20/A/1571-2922 Title: General subject files Collection Area: India Office Records and Private Papers Languages: English Date Range: 1906-1939 Extent: 1358 files
20. IOR/R/20/A/4109-4308 Reference (shelfmark): IOR/R/20/A/4109-4308 Title: Kamaran Administration files Collection Area: India Office Records and Private Papers Languages: English Date Range: 1917-1940 Extent: 200 files