21. IOR/V/27/740 Reference (shelfmark): IOR/V/27/740 Title: Electricity Collection Area: India Office Records and Private Papers Languages: English Date Range: 1901-1948 Extent: 57 volumes
22. IOR/V/27/750 Reference (shelfmark): IOR/V/27/750 Title: Marine Collection Area: India Office Records and Private Papers Languages: English Date Range: 1796-1956 Extent: 29 volumes
23. IOR/V/27/770 Reference (shelfmark): IOR/V/27/770 Title: Aviation Collection Area: India Office Records and Private Papers Languages: English Date Range: 1926-1955 Extent: 22 volumes
24. IOR/V/27/802 Reference (shelfmark): IOR/V/27/802 Title: Housing Collection Area: India Office Records and Private Papers Languages: English Date Range: 1909-1910 Extent: 2 volumes
25. IOR/V/27/810 Reference (shelfmark): IOR/V/27/810 Title: Population Collection Area: India Office Records and Private Papers Languages: English Date Range: 1857-1954 Extent: 17 volumes
26. IOR/V/27/820 Reference (shelfmark): IOR/V/27/820 Title: Emigration Collection Area: India Office Records and Private Papers Languages: English Date Range: 1838-1951 Extent: 36 volumes
27. IOR/V/27/852 Reference (shelfmark): IOR/V/27/852 Title: Hospitals Collection Area: India Office Records and Private Papers Languages: English Date Range: 1847-1926 Extent: 13 volumes
28. IOR/V/27/853 Reference (shelfmark): IOR/V/27/853 Title: Cholera Collection Area: India Office Records and Private Papers Languages: English Date Range: 1852-1897 Extent: 29 volumes
29. IOR/V/27/856 Reference (shelfmark): IOR/V/27/856 Title: Plague Collection Area: India Office Records and Private Papers Languages: English Date Range: 1838-1911 Extent: 64 volumes
30. IOR/V/27/858 Reference (shelfmark): IOR/V/27/858 Title: Lunacy Collection Area: India Office Records and Private Papers Languages: English Date Range: 1901-1937 Extent: 13 volumes