Cook's reports of seals on the island of South Georgia initiated in the Antarctic seas south of America a commercial enterprise, which is still carried on, and has incidentally thrown much light upon the geography of the South Polar regions. Indeed, almost the whole of such information, prior to the year 1839, was the outcome of sealing and whaling projects. About the year 1840, a wave of scientific enthusiasm resulted in the dispatch of three national expeditions by France, the United States, and Great Britain; part at least of whose programmes was Antarctic exploration. Russia had previously sent out an expedition which had made notable discoveries. The contributions to knowledge gained at this period were considerable. Those carried back to civilization by the British expedition under Ross, are so well known that they need not be described. The French under Dumont D'Urville and the Americans under Wilkes visited the region to the southward of Australia--the arena of our own efforts--and frequent references will be made to their work throughout this story. What has been termed the period of averted interest now intervened, before the modern movement set in with overpowering insistence. It was not till 1897 that it had commenced in earnest. Since then many adventurers have gone forth; most of the prominent civilized nations taking their share in exploration. By their joint efforts some, at least, of the mystery of Antarctica has been dispelled. It is now a commonplace, largely in the world of geographical concerns, that the earth has still another continent, unique in character, whose ultimate bounds are merely pieced together from a fragmentary outline. The Continent itself appears to have been sighted for the first time in the year 1820, but no human being actually set foot on it until 1895. The Belgian expedition under de Gerlache was the first to experience the Antarctic winter, spending the year 1898 drifting helplessly, frozen in the pack-ice, to the southward of America. In the following year a British expedition under Borchgrevinck, wintering at Cape Adare, passed a year upon the Antarctic mainland. The main efforts of recent years have been centred upon the two more accessible areas, namely, that in the American Quadrant** which is prolonged as a tongue of land outside the Antarctic Circle, being consequently less beset by ice; secondly, the vicinity of the Ross Sea in the Australian Quadrant. It is because these two favoured domains have for special reasons attracted the stream of exploration that the major portion of Antarctica is unknown. Nevertheless, one is in a position to sketch broad features which will probably not be radically altered by any future expeditions.