It will be interesting, and somewhat important, to note briefly, before entering on the consideration of the great Arctic voyages, just how much and how little we know about the polar region proper. The undiscovered region covers an area of scarcely less than a million and a half square miles; while between explored points on either side it is in certain directions as much as 1,500 miles across. Parry, in 1827, reached by a mixed boat and sledge journey as high a latitude as 82° 45’ N., while Captain Hall, the American, succeeded in _taking his vessel_, in 1871, as high as 82° 16’ N. in Smith’s Sound. As we shall hereafter see, both these exploits have now been beaten by the expedition under Captain (now Sir George S.) Nares. In general terms, we may say that the vast tract between 70° and 80° of north latitude has been pretty thoroughly explored on the European and American sides of the polar region, while much less is known of the same latitudes on the Asiatic side. How much of the in-lying region is land, or how far covered with water, has yet to be determined. In spite of the very positive utterances of many explorers and scientists, all we really know is that there _is_ much open water, or at all events ice-covered water, and that it _may_ extend to the Pole. No weight whatever can be attached to the once popular “open polar sea” theory, which rested principally on the statements of those who had, after reaching given points, been unable to see anything but open water before them. How would that wiseacre be esteemed, who, looking seaward from different parts of our coast, saw nought but ocean, and thereon immediately built a theory that no land existed in the direction of his gaze? America must be swept from _his_ map entirely, while even Continental Europe would have a poor chance—except on a fine day, and even then from but a few points of our south coast.