To this distinguished navigator was reserved the honour of being the first, who, from a series of the most satisfactory observations, beginning at the west entrance of the Strait of Magalhaens, and carried on with unwearied diligence, round Tierra del Fuego, through the Strait of Le Maire, has constructed a chart of the southern extremity of America, from which it will appear, how much former navigators must have been at a loss to guide themselves; and what advantages will be now enjoyed by those who shall hereafter sail round Cape Horn. IV. As the voyages of discovery, undertaken by his majesty's command, have facilitated the access of ships into the Pacific Ocean, they have also greatly enlarged our knowledge of its contents. Though the immense expanse usually distinguished by this appellation, had been navigated by Europeans for near two centuries and a half, by far the greater part of it, particularly to the south of the equator, had remained, during all this time, unexplored. The great aim of Magalhaens, and of the Spaniards in general, its first navigators, being merely to arrive, by this passage, at the Moluccas, and the other Asiatic spice islands, every intermediate part of the ocean that did not lie contiguous to their western track, which was on the north side of the equator, of course escaped due examination. And if Mendana and Quiros, and some nameless conductors of voyages before them, by deviating from this track, and steering westward from Callao, within the southern tropic, were so fortunate as to meet with various islands there, and so sanguine as to consider those islands as marks of the existence of a neighbouring southern continent, in the exploring of which they flattered themselves they should rival the fame of De Gama and Columbus, these feeble efforts never led to any effectual disclosure of the supposed hidden mine of a New World. On the contrary, their voyages being conducted without a judicious plan, and their discoveries being left imperfect without immediate settlement, or subsequent examination, and scarcely recorded in any well-authenticated or accurate narrations, had been almost forgot; or were so obscurely remembered, as only to serve the purpose of producing perplexing debates about their situation and extent, if not to suggest doubts about their very existence.