1. IOR/F/4/758/20569 Reference (shelfmark): IOR/F/4/758/20569 Title: Scope & Content: Plan of Lieutenant John Augustus Schalch for constructing a canal between the Hooghly and an easterly branch of the Ganges. Collection Area: India Office Records and Private Papers Languages: English Date Range: May 1820-Aug 1822 Extent: 1 file