Voyages of the Dutch brig of war Dourga : through the southern and little-known parts of the Moluccan Archipelago, and along the previously unknown southern coast of New Guinea performed during the years 1825 & 1826 / by D.H. Kolff, Jun., luitenant ter zee, 1st klasse, en Ridder van de Militaire Willems Orde ; translated from the Dutch by George Windsor Earl, author of the "Eastern Seas"