One great plan of nautical investigation having been pursued throughout, it is obvious, that the several voyages have a close connection, and that an exact recollection of what had been aimed at, and effected, in those that preceded, will throw considerable light on our period. With a view, therefore, to assist the reader in forming a just estimate of the additional information conveyed by this publication, it may not be improper to lay before him a short, though comprehensive, abstract of the principal objects that had been previously accomplished, arranged in such a manner, as may serve to unite, into one point of view, the various articles which lie scattered through the voluminous Journals already in the hands of the public; those compiled by Dr. Hawkesworth; and that which was written by Captain Cook himself. By thus shewing what had been formerly done, how much still remained for subsequent examination, will be more apparent; and it will be better understood on what grounds, though the ships of his Majesty had already circumnavigated the world five different times, in the course of about ten years, another voyage should still be thought expedient. There will be a farther use in giving such an abstract a place in this Introduction. The plan of discovery, carried on in so many successive expeditions, being now, we may take upon us to say, in a great measure completed; by summing up the final result, we shall be better able to do justice to the benevolent purposes it was designed to answer; and a solid foundation will be laid, on which we may build a satisfactory answer to a question, sometimes asked by a peevish refinement and ignorant malevolence, What beneficial consequences, if any, have followed, or are likely to follow, to the discoverers, or to the discovered, to the common interests of humanity, or to the increase of useful knowledge, from all our boasted attempts to explore the distant recesses of the globe? The general object of the several voyages round the world, undertaken by the command of his Majesty, prior to that related in this work, was to search for unknown tracts of land that might exist within the bosom of the immense expanse of ocean that occupies the whole southern hemisphere. Within that space, so few researches had been made, before our time, and those few researches had been made so imperfectly, that the result of them, as communicated to the world in any narration, had rather served to create uncertainty, than to convey information; to deceive the credulous, rather than to satisfy the judicious inquirer; by blending the true geography of above half the superficies of the earth, with an endless variety of plausible conjectures, suggested by ingenious speculation; of idle tales, handed down by obscure tradition; or of bold fictions, invented by deliberate falsehood.