At this period the spirit of discovery was reanimated in England, and an expedition was fitted out, at the instance of the Royal Society, primarily to observe a transit of Venus across the disk of the sun, which could only be done in some parts of the Pacific Ocean. Sir Hugh Palliser was again his friend, and Cook, raised to the rank of lieutenant, was appointed to the command. He selected a ship of three hundred and seventy tons, called the Endeavor, for the purpose, and accompanied by several eminent scientists, he sailed in 1778. In addition to its astronomical task, the expedition was to make discoveries and explorations in the Pacific. It would be impossible to follow Lieutenant Cook in the details of his three notable voyages of discovery in anything less than a volume, so full are they of interesting incidents. He proceeded first to Madeira, and then across the Atlantic to Rio Janeiro, where he made a considerable stay to obtain supplies, and improve the condition of his crew. Passing through the Strait of Le Maire, he went around Cape Horn, and in April of 1769 the Endeavor arrived at Otaheite, now called Tahiti, in the Society Islands, where the transit was to be observed. The observations required a considerable stay in Matavia Bay, and as soon as he had made his preparations on shore for the work, the commander established regulations for intercourse between his people and the natives who crowded in multitudes around their strange visitors. No man in his day and generation ever had more extensive dealings with the uncivilized tribes of the earth than Captain Cook, and none ever treated them with more enlightened humanity, or with more even-handed justice. His treatment of the aborigines of the vast number of islands and other regions he visited, is in remarkable contrast with that of the early explorers of the Western Continent. By the latter the natives were remorselessly slain, enslaved, and even tortured. They were regarded as pagans, with no natural rights, whose territories, families, and persons were the legitimate spoils of the conquerors. On the contrary, Cook, with the means in his possession to overawe, subdue, and subjugate them, always extended to them the utmost consideration in his power. He could be severe when necessity required, but his forbearance was almost unlimited.