11. IOR/R/20/B/2654-2679 Reference (shelfmark): IOR/R/20/B/2654-2679 Title: Chief Secretary: Secret Protectorate files Collection Area: India Office Records and Private Papers Languages: English Date Range: 1944-1955 Extent: 128 files
12. IOR/R/20/B/2680-2683 Reference (shelfmark): IOR/R/20/B/2680-2683 Title: Chief Secretary: Temporary secret files Collection Area: India Office Records and Private Papers Languages: English Date Range: 1951-1958 Extent: 4 files
13. IOR/R/20/B/3383-3444 Reference (shelfmark): IOR/R/20/B/3383-3444 Title: Chief Secretary: Secret Annexe files Collection Area: India Office Records and Private Papers Languages: English Date Range: 1958-1965 Extent: 62 files
14. IOR/R/20/B/3520 (Sub-sub-series) Reference (shelfmark): IOR/R/20/B/3520 (Sub-sub-series) Title: Public Works Department: miscellaneous file Collection Area: India Office Records and Private Papers Languages: English Date Range: 1950-1951 Extent: 1 file
15. IOR/R/20/B/3488-3501 Reference (shelfmark): IOR/R/20/B/3488-3501 Title: Office of the Administrator, Perim: miscellaneous files Collection Area: India Office Records and Private Papers Languages: English Date Range: 1936-1962 Extent: 14 files
16. IOR/R/20/B/3516-3519 Reference (shelfmark): IOR/R/20/B/3516-3519 Title: Public Relations and Information Office: Secret files Collection Area: India Office Records and Private Papers Languages: English Date Range: 1948-1952 Extent: 4 files
17. IOR/R/20/B/3521-3530 Reference (shelfmark): IOR/R/20/B/3521-3530 Title: Financial Secretary's Office: Finance and Development files Collection Area: India Office Records and Private Papers Languages: English Date Range: 1958-1962 Extent: 10 files
18. IOR/R/20/B/1061-1608 Reference (shelfmark): IOR/R/20/B/1061-1608 Title: Civil Secretary: Confidential and Secret Files Collection Area: India Office Records and Private Papers Languages: English Date Range: 1938-1940 Extent: 548 files
19. IOR/R/20/B/1609-1677 Reference (shelfmark): IOR/R/20/B/1609-1677 Title: Civil Secretary: Confidential (annual series) files Collection Area: India Office Records and Private Papers Languages: English Date Range: 1938-1951 Extent: 69 files
20. IOR/R/20/B/1678-1994 Reference (shelfmark): IOR/R/20/B/1678-1994 Title: Civil Secretary: World War II Ordinary files Collection Area: India Office Records and Private Papers Languages: English Date Range: 1939-1942 Extent: 317 files