It was in the year 1751 that the Chevalier de Niverville, with a small party of French _voyageurs_, pushed his way up the muddy waters of the Saskatchewan, and built Fort Lajonquière in the foothills of the Rocky Mountains. Niverville was not the discoverer of the mighty range that runs like a backbone throughout the length of North America. He had been anticipated some years before by a fellow-countryman, La Vérendrye, son of the patriotic explorer who had devoted his life to western discovery for the glory of his native land. Niverville, however, was the first White Man to look upon that portion of the mountains now known as the Canadian Rockies. One wonders what his impressions were as he gazed out to the westward over that bewildering scene. As a Canadian officer he had served in the expeditions against the New England Colonies, and was therefore familiar with the mountains of New Hampshire and Vermont, as well as with his own Laurentian Hills, but what preparation were these for such awe-inspiring majesty? Range piled upon range to the westward, soaring up and up in vast towers and domes and spires, and extending north and south to the utmost limits of vision, they must have seemed to Niverville an impregnable fortification designed to bar all further progress in this direction. Niverville was not the man, however, to be daunted by even the most formidable natural obstacle, and he was not without evidence that a way might be found through the mountains to the shores of that Western Sea for which he and many other Canadian explorers had been searching, even since the days of Champlain. While at Fort Lajonquière a party of Indians visited him, from whom he learned that they had traded with a strange tribe whose home was far to the westward, beyond the great barrier, and who spoke of White Men that they had seen on the sea coast. Niverville no doubt made plans for an expedition through the mountains, but they came to nothing. His leader, Saint-Pierre, was having trouble with the Indians at his fort on the Assiniboine; Niverville was recalled, and before long the entire party of French explorers were making their way back to far-off Quebec, to help Montcalm in his last desperate effort to save New France. In 1754, and again in 1772, officers of the Hudson's Bay Company made journeys of exploration from York Factory, on the western shores of Hudson Bay, to the country of the Blackfoot Indians, among the foothills of the Rocky Mountains; but it was not until 1793 that any White Man was daring enough to penetrate their fastnesses. In that year Alexander Mackenzie, who had four years earlier descended the river that bears his name, to the shores of the Arctic Ocean, forced his way through the Peace River Pass, and after suffering great hardships, stood at last beside the waters of the Pacific, fulfilling at last the dream of French explorers of an overland route to the Western Sea.