The Pelew Islands, one of the divisions of Polynesia, though they probably had been seen, and perhaps visited by Europeans before 1783, were certainly first made completely known to them at this period, in consequence of the shipwreck of Captain Wilson on them.  The Sandwich Isles, the next group, have been discovered within the last century by Captain Cook, on his last voyage.  The Marquesas, discovered by Mandana, were visited by Captain Cook in 1774, by the French in 1789, and particularly and carefully examined during the missionary voyage of Captain Wilson in 1797.  Captain Wallis, who sailed with Captain Carteret in 1766, but was afterwards separated from him in his course across the South Pacific, discovered several islands, particularly Otaheite; to this and the neighbouring islands the name of Society Isles was given.  Such are the most important discoveries that have been made in Polynesia during the last century; but besides these, other discoveries of less importance have been made, either by navigators who have sailed expressly for the purpose, as Kotzebue, &c., or by accident, while crossing this immense ocean.  In consequence of the advances which the Sandwich Islands have made in civilization, commerce, and the arts, there is considerable intercourse with them, especially by the Americans; and their voyages to them, and from thence to China, whither they carry the sandal wood, &c. which they obtain there, as well as their voyages from the north-west coast of America with furs to China, must soon detect any isles that may still be unknown in this part of the Pacific Ocean.

Although, therefore, much remains yet to be accomplished by maritime expeditions, towards the extension and correction of our geographical knowledge, so far as the bearings of the coast, and the latitudes and longitudes of various places are concerned, there seems no room for what may properly and strictly be called discovery, at least of any thing but small and scattered islands.

It is otherwise with the accessions which land expeditions may still make to geographical knowledge; for though within these one hundred years the European foot has trodden where it never trod before, and though our geographical knowledge of the interior of Africa, Asia, and America, has been, rendered within that period not only more extensive, but also more accurate and minute than it previously was, yet much remains to be done and known.

In giving a short and rapid sketch of the progress of discovery, so far as it has been accomplished by land expeditions during the period alluded to, we are naturally led to divide what we have to say according to the three great portions of the globe which have been the objects of these expeditions, viz.  Africa, Asia, and America.