122 Mackenzie’s Voyages describes as an excellent spot for a fort, or factory, as there was plenty of wood, and every reason to believe that the country abounded in beaver. “As for the other animals they are in evident abundance, as in every direction, the elk and the buffalo are seen in possession of the hills and plains. The land above the spot where we encamped spreads into an extensive plain, and stretches on to a very high ridge, which in some parts presents a face of rock but is principally covered with verdure, and varied with the poplar and white birch tree. ‘The country is so crowded with animals as to have the appearance in some places of a stall-yard, from the state of the ground, and the quantity of dung which is scattered over it. The soil is black and light. We this day saw two grisly and hideous bears.” At two on the afternoon of Friday, 17 May, eight days after the commencement of the voyage, “the Rocky Moun- tains appeared in sight with their summits covered with snow, bearing south-west by south. “They formed a very agreeable object to every person in the canoe, as we attained the view of them much sooner than we expected.” Mackenzie was still in the Peace River Block a few miles below Hudson’s Hope. The river trough at this point varies in height up to a hundred feet and more, and it is impossible usually to get a view of the prairie-level. Mackenzie was accustomed to the low elevations of the plains, so that a mountain of two thousand feet looked bigger to him than it would to one used to the sight of great ranges. What he really saw was the first ridge of the foothills west of Hudson’s Hope now known as Bull’s Head Mountain. He was still over eighty miles in a direct line from the main range, and probably more than a hundred by the river. As far north as the fifty-sixth parallel the Rockies have lost more than half their height, and they continue to diminish northward, Mount