Awstralia orllewinol = Western Australia [electronic resource] : hanes a chynydd y wlad a'i thrigolion, amaethyddiaeth, a chloddfeydd aur, a'r brodorion duon a'u harferion (gyda llawer o ddarluniau) = history and progress of the country and its inhabitants, agriculture, and gold mines, and the black natives and their customs (with many pictures) / gan Jonathan Ceredig Davies = by Jonathan Ceredig Davies