1. IOR/R/20/C/1753-1933 Reference (shelfmark): IOR/R/20/C/1753-1933 Title: Secret files Collection Area: India Office Records and Private Papers Languages: English Date Range: 1937-1966 Extent: 181 files
2. IOR/R/20/C/1934-1953 Reference (shelfmark): IOR/R/20/C/1934-1953 Title: Top secret files Collection Area: India Office Records and Private Papers Languages: English Date Range: 1950-1967 Extent: 18 files
3. IOR/R/20/C/1267-1752 Reference (shelfmark): IOR/R/20/C/1267-1752 Title: Ordinary and confidential files Collection Area: India Office Records and Private Papers Languages: English Date Range: 1937-1966 Extent: 486 files
4. IOR/R/20/C/1954-2039 Reference (shelfmark): IOR/R/20/C/1954-2039 Title: Mukalla Residency: miscellaneous records Collection Area: India Office Records and Private Papers Languages: English Date Range: 1919-1965 Extent: 94 files