Geological map of the Colony of the Cape of Good Hope showing superficial deposits, Ecca and Dwyka Series of the Karoo System, Wittenberg, Bokkeveld and Table Mountain Series of the Cape System, French Hoek beds, Malmesbury Series, dolerite and diabase, and qartz-porphyry granite, railwys, roads, rivers, and mountains. Coloured. Scale: 1 in. to 5 English miles. Projection not given.