1. IOR/Z/L/PS/5 Reference (shelfmark): IOR/Z/L/PS/5 Title: Secret Correspondence with India Collection Area: India Office Records and Private Papers Languages: English Date Range: 1802-1874 Extent: 7 volumes
2. IOR/Z/L/PS/5/7 Reference (shelfmark): IOR/Z/L/PS/5/7 Title: Register of Secret Papers transferred to other Departments Collection Area: India Office Records and Private Papers Languages: English Date Range: 1859-1869 Extent: 1 volume
3. IOR/Z/L/PS/5/2 Reference (shelfmark): IOR/Z/L/PS/5/2 Title: Register of Secret Letters received from India, Madras, Bombay, etc Collection Area: India Office Records and Private Papers Languages: English Date Range: 1859-1869 Extent: 1 volume
4. IOR/Z/L/PS/5/5 Reference (shelfmark): IOR/Z/L/PS/5/5 Title: Register of Secret Despatches to India, Madras, Bombay, etc Collection Area: India Office Records and Private Papers Languages: English Date Range: 1859-1869 Extent: 1 volume
5. IOR/Z/L/PS/5/6 Reference (shelfmark): IOR/Z/L/PS/5/6 Title: Register of Secret Letters from and Despatches to India, Madras, Bombay Collection Area: India Office Records and Private Papers Languages: English Date Range: 1870-1874 Extent: 1 volume
6. IOR/Z/L/PS/5/1 Reference (shelfmark): IOR/Z/L/PS/5/1 Title: Board's Register of most Secret Letters received from India, Madras, Bombay, etc Collection Area: India Office Records and Private Papers Languages: English Date Range: 1838-1839 Extent: 1 volume
7. IOR/Z/L/PS/5/3 Reference (shelfmark): IOR/Z/L/PS/5/3 Title: Board's Register of Secret Despatches to Bengal, Madras, Bombay, etc., and of Secret Home Correspondence Collection Area: India Office Records and Private Papers Languages: English Date Range: 1802-1834 Extent: 1 volume
8. IOR/Z/L/PS/5/4 Reference (shelfmark): IOR/Z/L/PS/5/4 Title: Index to Board's Register of Secret Despatches to Bengal, Madras, Bombay, etc., and of Secret Home Correspondence Collection Area: India Office Records and Private Papers Languages: English Date Range: 1802-1818 Extent: 1 volume