There is a particular spot in those wild regions which lie somewhere near the northern parts of Baffin's Bay, where Nature seems to have set up her workshop for the manufacture of icebergs, where Polar bears, in company with seals and Greenland whales, are wont to gambol, and where the family of Jack Frost may be said to have taken permanent possession of the land. One winter day, in the early part of the eighteenth century, a solitary man might have been seen in that neighbourhood, travelling on foot over the frozen sea in a staggering, stumbling, hurried manner, as if his powers, though not...