11. IOR/W/L/PS/21/K Reference (shelfmark): IOR/W/L/PS/21/K Title: North-West Frontier. Collection Area: Map Collections Languages: English Date Range: [c 1900] Extent: 101 items
12. IOR/W/L/PS/21/M Reference (shelfmark): IOR/W/L/PS/21/M Title: Series of roll maps Scope & Content: IOR/W/LPS/21/M 31-31 have been altered to W/LPS/10/342-344 Collection Area: Map Collections Languages: English Date Range: Unspecified Extent: Unknown
13. IOR/W/L/PS/21/N4 Reference (shelfmark): IOR/W/L/PS/21/N4 Title: INDIA AND ADJACENT COUNTRIES [1:253,440]. Surveyor General of India. Collection Area: Map Collections Languages: English Date Range: c 1910-c 1940 Extent: 425 sheets