1. IOR/L/E/7/1421, File 6422 Reference (shelfmark): IOR/L/E/7/1421, File 6422 Title: File 6422 Measure for the eradication of the water hyacinth in Bengal Collection Area: India Office Records and Private Papers Languages: English Date Range: 13 Aug 1925-30 Apr 1929 Extent: 1 file