The survey of the intricate reverie system of New South Wales and the Macquarie Marshes; the discovery of that "noble stream", the Darling, sweeping majestically through the hot silent outback; the homesteads, ranches and stockyards along the Murrumbidgee; the busy traffic that plies the great Murray; the slowly awakening desert of Australia; and, above all, a legend of humanity and forbearance - all this is his real memorial.