1. IOR/L/PWD/3/1-25 Reference (shelfmark): IOR/L/PWD/3/1-25 Title: Public Works Letters from India Collection Area: India Office Records and Private Papers Languages: English Date Range: 1855-1879 Extent: 25 volumes
2. IOR/L/PWD/3/26-39 Reference (shelfmark): IOR/L/PWD/3/26-39 Title: Public Works Letters from India Collection Area: India Office Records and Private Papers Languages: English Date Range: 1880-1925 Extent: 14 volumes
3. IOR/L/PWD/3/40-113 Reference (shelfmark): IOR/L/PWD/3/40-113 Title: Railway Letters and Enclosures from Bengal and India Collection Area: India Office Records and Private Papers Languages: English Date Range: 1845-1879 Extent: 74 volumes
4. IOR/L/PWD/3/114-124 Reference (shelfmark): IOR/L/PWD/3/114-124 Title: Telegraph Letters and Enclosures from India Collection Area: India Office Records and Private Papers Languages: English Date Range: 1860-1879 Extent: 11 volumes
5. IOR/L/PWD/3/125-145 Reference (shelfmark): IOR/L/PWD/3/125-145 Title: Railway and Telegraph Letters from Bengal and India Scope & Content: Telegraph letters begin in IOR/L/PWD/3/135 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1850-1879 Extent: 21 volumes
6. IOR/L/PWD/3/146-179 Reference (shelfmark): IOR/L/PWD/3/146-179 Title: Railway and Telegraph Letters from India Collection Area: India Office Records and Private Papers Languages: English Date Range: 1880-1925 Extent: 34 volumes
7. 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
8. IOR/L/PWD/3/182-184 Reference (shelfmark): IOR/L/PWD/3/182-184 Title: Public Works, Railway and Telegraph Secretary's Letters from India, Madras and Bombay Collection Area: India Office Records and Private Papers Languages: English Date Range: 1876-1879 Extent: 3 volumes
9. IOR/L/PWD/3/185-196 Reference (shelfmark): IOR/L/PWD/3/185-196 Title: Public Works Letters from Madras Collection Area: India Office Records and Private Papers Languages: English Date Range: 1855-1879 Extent: 12 volumes
10. IOR/L/PWD/3/197-200 Reference (shelfmark): IOR/L/PWD/3/197-200 Title: Public Works Letters from Madras Collection Area: India Office Records and Private Papers Languages: English Date Range: 1884-1917 Extent: 4 volumes