31. IOR/L/PWD/7/1961-1974 Reference (shelfmark): IOR/L/PWD/7/1961-1974 Title: British Engineering Standards Association: Minutes, Papers and Correspondence Collection Area: India Office Records and Private Papers Languages: English Date Range: 1913-1931 Extent: 14 volumes
32. IOR/L/PWD/3/180-181 Reference (shelfmark): IOR/L/PWD/3/180-181 Title: Railway Secretary's Letters from India Collection Area: India Office Records and Private Papers Languages: English Date Range: 1873-1879 Extent: 2 volumes
33. IOR/L/PWD/5/1-11 Reference (shelfmark): IOR/L/PWD/5/1-11 Title: Public Works 'Old Series' (Collections) Collection Area: India Office Records and Private Papers Languages: English Date Range: 1856-1879 Extent: 11 volumes
34. IOR/L/PWD/7/1224-1835 Reference (shelfmark): IOR/L/PWD/7/1224-1835 Title: Indo-European Telegraph Department Files (London Headquarters) Collection Area: India Office Records and Private Papers Languages: English Date Range: 1877-1932 Extent: 612 volumes
35. IOR/L/PWD/8/4-6 Reference (shelfmark): IOR/L/PWD/8/4-6 Title: Telegraph Department Appointments Collection Area: India Office Records and Private Papers Languages: English Date Range: 1863-1870 Extent: 3 volumes
36. IOR/L/PWD/8/41-403 Reference (shelfmark): IOR/L/PWD/8/41-403 Title: College Correspondence Files Collection Area: India Office Records and Private Papers Languages: English Date Range: 1871-1907 Extent: 363 volumes
37. IOR/L/PWD/2/43-63 Reference (shelfmark): IOR/L/PWD/2/43-63 Title: Railway Home Correspondence - A. Original Letters Received Collection Area: India Office Records and Private Papers Languages: English Date Range: 1845-1858 Extent: 21 volumes
38. IOR/L/PWD/3/295-313 Reference (shelfmark): IOR/L/PWD/3/295-313 Title: Public Works Despatches to India (Original Drafts) Collection Area: India Office Records and Private Papers Languages: English Date Range: 1855-1879 Extent: 19 volumes
39. IOR/L/PWD/3/412-418 Reference (shelfmark): IOR/L/PWD/3/412-418 Title: Railway Despatches to Bengal and India (Copies) Collection Area: India Office Records and Private Papers Languages: English Date Range: 1849-1879 Extent: 7 volumes
40. IOR/L/PWD/3/506-515 Reference (shelfmark): IOR/L/PWD/3/506-515 Title: Public Works Despatches to Madras (Original Drafts) Collection Area: India Office Records and Private Papers Languages: English Date Range: 1855-1879 Extent: 10 volumes