A detailed plan of an irrigation scheme along the Olifants River, extending along the Hol and Doorn Rivers, showing canal alignment, mileage of canal, distance along canal, irrigable alluvial and Karroo soil, irrigable lots, land at present under irrigation, drift sand, rock and localities from which soil samples have been collected, with roads, farms and place names such as Ebenezer, Vleermuisklip, Zand Kraal, Klipdrift, Zoutfontein, Roode Klipheuwel, Zypherfontein, Rondeberg. Colour. Relief shown by form lines. Scale 2 inches to 1 mile. Inset Locality map, some colour, scale 7/8 inch to 10 miles.