The object of his second voyage (1772-1775) was to determine finally the question of the existence of a great southern continent, and to extend the geography of that part of the globe to its utmost limits. Sir Joseph Banks and Dr. Solander had accompanied him on his first voyage, this time John Reinhold Forster and his son George were engaged by government to explore and collect the natural history of the countries through which they should pass.
On the 13th of July, 1772, Cook sailed from Plymouth, and reached the Cape without having a single man sick. Well aware how much cleanliness and pure air contribute to health, he had neglected none of the means necessary to insure it. Every day the beds were aired, the linen of the sailors was frequently washed, and in rainy weather fire often made between decks, to dispel unwholesome damps and effluvia.
He now sailed to the south far into a desert and unknown sea, crossed it in various directions, and after having spent 117 days on the ocean, mostly among floating ice-fields, and without having once seen land, he steered northwards to the well-known coast of New Zealand, where on the 25th of January, 1773, he cast anchor in Dusky Bay. The feelings of the seaman may be imagined, when, after long wanderings over the waste of waters, he sees land, mountains, forests, and green plains rise above the horizon, when singing-birds take the place of the wild sea-mew, and friendly faces greet him on the strand. A beneficent mind is ever anxious to do good, and thus before sailing farther on to Otaheite, Cook caused a little garden to be planted, in which European vegetable seeds were sown and confided with proper instructions to the care of the intelligent savages, who were moreover presented with goats and pigs.
On the return voyage from Tahiti to New Zealand, where he intended to provide himself with fire-wood and provisions, before advancing once more into the high southern latitudes, he was pleased with the discovery of the small but lovely Harvey Islands, whose green girdle of cocoa-nut palms mirrors itself in the dark blue waters.
And now again he cruised in all directions through the icy sea, over an extent of 65° of longitude and as far as the 71st degree of southern latitude, without having seen any land; and having thus satisfied himself of the non-existence of a southern continent, or at least of its circumscription within bounds which must ever render it perfectly useless to man, he left those dreary regions of eternal winter, to continue his discoveries under a less inclement sky.
He first visited Easter Island and the Marquesas, where a new discovery received the name of Hood's Island, and on the way thence to Tahiti added the Palisser Group to the map of the world. We now follow him to the extensive archipelago of Espiritu Santo, first seen by Quiros in 1606, who took it for a part of the imaginary southern continent. Since then it had only been visited by Bougainville (1768), who however had contented himself with landing on the Isle of Lepers, and ascertaining the fact that it did not form part of a continent but of a considerable group of islands. Cook on his part examined the whole archipelago in such an accurate manner, ascertaining the situation of many of the islands and discovering such numbers of new ones, that he justly thought he had acquired the right to rebaptize them under the name of the New Hebrides.
From these islands he sailed for the third time to New Zealand, and discovered on his passage New Caledonia and the romantic Norfolk Island.
Leaving New Zealand on the 10th of November, 1774, once more to search for the southern continent, he traversed a vast extent of sea for 17 days, from 43° to 55° 48′ S. lat., when he gave up all thoughts of finding any more land in that part of the ocean, and determined to steer directly for the west entrance of the Straits of Magellan, with a design of coasting the southern part of Tierra del Fuego, quite round Cape Horn to Le Maire's Straits. Those wild, deeply indented, rocky coasts, the region of eternal storms and fogs, form the most striking contrast to the smiling shores of the South Sea islands. But, if in the latter the splendour of tropical vegetation enchants the eye of the spectator, the exuberance of animal life in the Magellanic Archipelago may well raise his astonishment. In one of the small islands near Staaten Land Cook admired the remarkable harmony reigning among the different species of mammifera and birds. The sea-lions occupied the greatest part of the sea-coast, the bears the inland; the shags were posted on the highest cliffs, the penguins in such places as had the best access to the sea; and the other birds chose more retired places. Occasionally, however, all these animals were seen to mix together like domestic cattle and poultry in a farmyard, without one attempting to hurt the other in the least. Even the eagles and the vultures were frequently observed sitting together on the hills among the shags, while none of the latter, either old or young, appeared to be disturbed at their presence. No doubt the poor fishes had to pay for the touching union of this "happy family."
Having fully explored the southern extremity of America, we once more see the indefatigable navigator steer forth into the deserts of the southern Polar Ocean, where he discovers some snow-clad isles, Bird Island, South Georgia, Sandwich Land, the southern Thule; and finally returns to England (30th July, 1775) after an absence of three years and seventeen days.
His third voyage (1776) was undertaken for the purpose of exploring the Northern Pacific, and casting the same broad light over those unvisited waters as over the southern part of that vast ocean. To the south-east of the Cape of Good Hope he discovered Prince Edward's Islands, and thence proceeded to explore Kerguelen's Land, discovered six years previously by the Frenchman of that name. This wintry island bears neither tree nor shrub, but in the bays the gigantic sea-weeds form submarine forests, and countless penguins make the dreary shores resound with their deep braying voice.