Sailing to the westward, he examined the east coast of New Holland, as it was then called, Australia, at the present time, charted the coast, as he had done throughout the voyage, and took possession of the country in the name of England. The existence of a Southern Continent had long been a mooted question, and in this and subsequent voyages Captain Cook searched unsuccessfully for it. He passed through Torres Strait, and thus proved that New Guinea was not a part of Australia, as some claimed. Continuing his voyage, he went around the Cape of Good Hope, and reached England in the middle of 1771. The results of his cruise of nearly four years were exceedingly important to his country. His reputation was largely increased, and he was promoted to the rank of commander in the navy. So well approved was the conduct of Captain Cook on his first voyage around the world, that he was appointed to the command of another similar expedition, consisting of two ships, the Resolution and the Adventure, and after about a year on shore, he sailed again in 1772. He went around the Cape of Good Hope, and cruised in the Southern Pacific, discovering and taking possession of New Caledonia, visiting islands where he had landed before, and exploring and charting the New Hebrides. His instructions particularly required him to circumnavigate the earth in the highest practicable southern latitude in search of the unknown continent still supposed to be there. He used the southern summer for this purpose; but he found no land he was willing to call a continent. Though large bodies of land have since been discovered in that region, the question is still an open one. Adapting his operations to the varying climate of the north and the south, Captain Cook continued his explorations, encountering many hardships and perils in unknown seas, from hostile savages, and in the icy realms of the extreme south. He returned to England in 1775 after an absence of three years. The commander had always taken excellent care of the health of his men, for in voyages of the description he had undertaken the mortality was always considerable, and sometimes terrible. One of the most noticeable features of his second expedition was that it returned with a record of only one death in both ships; and the details of the means he used to secure a good sanitary condition among his crews are very interesting.