1. IOR/R/20/C/1-1266 Reference (shelfmark): IOR/R/20/C/1-1266 Title: Protectorate Secretary's files Collection Area: India Office Records and Private Papers Languages: English Date Range: 1922-1967 Extent: 1268 files
2. IOR/R/20/C/1267-2039 Reference (shelfmark): IOR/R/20/C/1267-2039 Title: Eastern Aden Protectorate: Adviser and British Agent, Mukalla Residency Collection Area: India Office Records and Private Papers Languages: English Date Range: 1919-1967 Extent: 779 files
3. IOR/R/20/C/2040-2059 Reference (shelfmark): IOR/R/20/C/2040-2059 Title: Eastern Aden Protectorate: Assistant Adviser, Northern Areas, Sai'un Collection Area: India Office Records and Private Papers Languages: English Date Range: 1940-1965 Extent: 24 files
4. IOR/R/20/C/2060-2063 Reference (shelfmark): IOR/R/20/C/2060-2063 Title: Political Officer, Socotra Collection Area: India Office Records and Private Papers Languages: English Date Range: 1943-1945 Extent: 4 files
5. IOR/R/20/C/2064-2243 Reference (shelfmark): IOR/R/20/C/2064-2243 Title: Western Aden Protectorate: Adviser and British Agent Collection Area: India Office Records and Private Papers Languages: English Date Range: 1940-1965 Extent: 183 files
6. IOR/R/20/C/2244-2425 Reference (shelfmark): IOR/R/20/C/2244-2425 Title: Files of WAP Adviser concerning tribes Collection Area: India Office Records and Private Papers Languages: English Date Range: 1924-1965 Extent: 182 files
7. IOR/R/20/C/2426-2506 Reference (shelfmark): IOR/R/20/C/2426-2506 Title: WAP: District Area files of Assistant Advisers Collection Area: India Office Records and Private Papers Languages: English Date Range: 1948-1966 Extent: 81 files
8. IOR/R/20/C/2507-2542 Reference (shelfmark): IOR/R/20/C/2507-2542 Title: Hodeida Collection Area: India Office Records and Private Papers Languages: English Date Range: 1919-1943 Extent: 36 files
9. IOR/R/20/C/2543-2546 Reference (shelfmark): IOR/R/20/C/2543-2546 Title: Headquarters British Forces Aden: Secret Operations Reports Collection Area: India Office Records and Private Papers Languages: English Date Range: 1941-1949 Extent: 4 files