21. IOR/R/20/A/4405-4507 Reference (shelfmark): IOR/R/20/A/4405-4507 Title: Trade Registration Office Collection Area: India Office Records and Private Papers Languages: English Date Range: 1905-1955 Extent: 103 volumes
22. IOR/R/20/A/4517-4519 Reference (shelfmark): IOR/R/20/A/4517-4519 Title: Aden Port Trust Collection Area: India Office Records and Private Papers Languages: English Date Range: 1908-1951 Extent: 3 files
23. IOR/R/20/A/4369-4386 Reference (shelfmark): IOR/R/20/A/4369-4386 Title: Court of the Resident Collection Area: India Office Records and Private Papers Languages: English Date Range: 1882-1908 Extent: 18 files
24. IOR/R/20/A/4389 Reference (shelfmark): IOR/R/20/A/4389 Title: File [101] Marriage Register Collection Area: India Office Records and Private Papers Languages: English Date Range: 1891-1946 Extent: 1 file
25. IOR/R/20/A/4848-4861 Reference (shelfmark): IOR/R/20/A/4848-4861 Title: Political Agency, Dthala Collection Area: India Office Records and Private Papers Languages: English Date Range: 1903-1907 Extent: 14 files
26. IOR/R/20/A/4862-4884 Reference (shelfmark): IOR/R/20/A/4862-4884 Title: Protectorate Miscellaneous files Collection Area: India Office Records and Private Papers Languages: English Date Range: 1903-1937 Extent: 23 files
27. IOR/R/20/A/4936-4942 Reference (shelfmark): IOR/R/20/A/4936-4942 Title: Saudi Arabia files Collection Area: India Office Records and Private Papers Languages: English Date Range: 1921-1937 Extent: 7 files
28. IOR/R/20/A/4520-4847 Reference (shelfmark): IOR/R/20/A/4520-4847 Title: Arabic Department General files Collection Area: India Office Records and Private Papers Languages: English Date Range: 1878-1922 Extent: 331 files
29. IOR/R/20/A/4068-4108 Reference (shelfmark): IOR/R/20/A/4068-4108 Title: World War I Confidential files Collection Area: India Office Records and Private Papers Languages: English Date Range: 1915-1940 Extent: 41 files
30. IOR/R/20/A/1066 Reference (shelfmark): IOR/R/20/A/1066 Title: File 7 Appointments Collection Area: India Office Records and Private Papers Languages: English Date Range: May 1882-Jul 1910 Extent: 1 file