11. IOR/F/4/142/2493A Reference (shelfmark): IOR/F/4/142/2493A Title: Scope & Content: Major James Rennell's observations on the proposed surveys of the mouths of the Ganges and the Sundarbans. Collection Area: India Office Records and Private Papers Languages: English Date Range: Unspecified Extent: 1 file
12. IOR/F/4/142/2496 Reference (shelfmark): IOR/F/4/142/2496 Title: Scope & Content: Report on the usefulness of the spiral buoys laid in the Hooghly river by Captain Patrick Campbell in 1798. Collection Area: India Office Records and Private Papers Languages: English Date Range: Apr 1797-Mar 1803 Extent: 1 file