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xxviii ground for thinking this was not the case. Later still, in 1873, the possibility of laying submarine cables made it necessary to investigate the nature of the abyssal depths, and the Challenger proved that not only does life, and in quite high forms, exist there, but that there are fish which can see. It is now almost certain that there is a great oxidized northward-creeping current which flows out of the Antarctic Ocean and under the waters of the other great oceans of the world.

It was the good fortune of Ross, at a time when the fringes of the great Antarctic continent were being discovered in comparatively low latitudes of 66° and thereabouts, sometimes not even within the Antarctic Circle, to find to the south of New Zealand a deep inlet in which he could sail to the high latitude of 78°. This inlet, which is now known as the Ross Sea, has formed the starting-place of all sledging parties which have approached the South Pole. I have dwelt upon this description of the lands he discovered because they will come very intimately into this history. I have also emphasized his importance in the history of Antarctic exploration because Ross having done what it was possible to do by sea, penetrating so far south and making such memorable discoveries, the next necessary step in Antarctic exploration was that another traveller should follow up his work on land. It is an amazing thing that sixty years were allowed to elapse before that traveller appeared. When he appeared he was Scott. In the sixty years which elapsed between Ross and Scott the map of the Antarctic remained practically unaltered. Scott tackled the land, and Scott is the Father of Antarctic sledge travelling.

This period of time saw a great increase in the interest taken in science both pure and applied, and it had been pointed out in 1893 that "we knew more about the planet Mars than about a large area of our own globe." The Challenger Expedition of 1874 had spent three weeks within the Antarctic Circle, and the specimens brought home by her from the depths of these cold seas had aroused curiosity. Meanwhile Borchgrevink (1897) landed at Cape