21. IOR/L/PS/20/D171/1 Reference (shelfmark): IOR/L/PS/20/D171/1 Title: Handbook on the Abor country Simla: General Staff India, 1911 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1911 Extent: iii, 48pp, ii (appendix - in pocket) 2 maps (in pocket)
22. IOR/L/PS/20/D223/3 Reference (shelfmark): IOR/L/PS/20/D223/3 Title: Photographs [to accompany] detailed report ... on Lohit valley reconnaissance [London: India Office, 1944] Collection Area: India Office Records and Private Papers Languages: English Date Range: 1944 Extent: 12 sheets
23. IOR/L/PS/20/D223/4 Reference (shelfmark): IOR/L/PS/20/D223/4 Title: Sketches [to accompany] detailed report ... on Lohit valley reconnaissance [London: India Office, 1944] Collection Area: India Office Records and Private Papers Languages: English Date Range: 1944 Extent: 16 sketches
24. IOR/L/PS/20/D10A Reference (shelfmark): IOR/L/PS/20/D10A Title: Appendices to report (topographical, political, and military) on the North-East Frontier of India Calcutta: Quarter Master General's Dept, 1883 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1883 Extent: 50, 35pp
25. IOR/L/PS/20/D180 Reference (shelfmark): IOR/L/PS/20/D180 Title: [Printed papers concerning negotiations for revised treaties between British India and Upper Burma ("Burmese Embassy Series"), May 1882-June 1883] Collection Area: India Office Records and Private Papers Languages: English Date Range: 1882-1883 Extent: Unspecified
26. IOR/L/PS/20/D186 Reference (shelfmark): IOR/L/PS/20/D186 Title: Gazetteer of the province of Yun-nan Simla: General Staff India, 1913 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1913 Extent: iii, 173pp sketches plans (in pocket)
27. IOR/L/PS/20/D229 Reference (shelfmark): IOR/L/PS/20/D229 Title: Wa notes [Rangoon: Govt of Burma Home and Political Dept, 1936] Collection Area: India Office Records and Private Papers Languages: English Date Range: 1936 Extent: 8pp
28. IOR/L/PS/20/D134/2 Reference (shelfmark): IOR/L/PS/20/D134/2 Title: Additions to routes in Yunnan, 1919 Calcutta: General Staff India, 1st series, 1920 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1920 Extent: 51pp
29. IOR/L/PS/20/D163/2 Reference (shelfmark): IOR/L/PS/20/D163/2 Title: Corrections to routes in Bhutan, 1925 Simla: General Staff India, 1st series, 1927 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1927 Extent: 11pp
30. IOR/L/PS/20/D201 Reference (shelfmark): IOR/L/PS/20/D201 Title: Military report on the Naga Hills (including routes) Simla: General Staff India, 1914 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1914 Extent: iv, 178pp map (in pocket)