Man would not seem to present the same embarrassments, in the discussion, as the inferior orders. He is fitted by nature for every climate, the burning sun of the tropics and the icy atmosphere of the North. He wanders indifferently over the sands of the desert, the waste of polar snows, and the pathless ocean. Neither mountains nor seas intimidate him, and, by the aid of mechanical contrivances, he accomplishes journeys which birds of boldest wing would perish in attempting. Without ascending to the high northern latitudes, where the continents of Asia and America approach within fifty miles of each other, it would be easy for the inhabitant of Eastern Tartary or Japan to steer his canoe from islet to islet, quite across to the American shore, without ever being on the ocean more than two days at a time.[357] The communication is somewhat more difficult on the Atlantic side. But even there, Iceland was occupied by colonies of Europeans many hundred years before the discovery by Columbus; and the transit from Iceland to America is comparatively easy.[358] Independently of these channels, others were opened in the Southern hemisphere, by means of the numerous islands in the Pacific. The population of America is not nearly so difficult a problem as that of these little spots. But experience shows how practicable the communication may have been, even with such sequestered places.[359] The savage has been picked up in his canoe, after drifting hundreds of leagues on the open ocean, and sustaining life, for months, by the rain from heaven, and such fish as he could catch.[360] The instances are not very rare; and it would be strange if these wandering barks should not sometimes have been intercepted by the great continent which stretches across the globe, in unbroken continuity, almost from pole to pole. No doubt, history could reveal to us more than one example of men who, thus driven upon the American shores, have mingled their blood with that of the primitive races who occupied them.