Having taken, on the day of his departure, the latitude and longitude of his winter post, Mackenzie started on May 9th, 1793, for his notable voyage. Seeing on the banks of the river elk, buffalo, and bear, the expedition pushed ahead, meeting the difficulties of navigation with patience and skill. The murmurs of his men and the desire to turn back made no impression on Mackenzie, who, now that his Highland blood was up, determined to see the journey through. The difficulties of navigation became extreme, and at times the canoes had to be drawn up stream by the branches of trees. At length in longitude 121° W. Mackenzie reached a lake, which he considered the head of the Ayugal or Peace River. Here the party landed, unloaded the canoes, and by a portage of half-a-mile on a well-beaten path, came upon another small lake. From this lake the explorers followed a small river, and here the guide deserted the party. On June 17th the members of the expedition enjoyed, after all their toil and anxiety, the "inexpressible satisfaction of finding themselves on the bank of a navigable river on the west side of the first great range of mountains." Running rapids, breaking canoes, re-ascending streams, quieting discontent, building new canoes, disturbing tribes of surprised Indians, and urging on his discouraged band, Mackenzie persistently kept on his way. He was descending on Tacouche Tesse, afterwards known as the Fraser River. Finding that the distance by this river was too great, he turned back. At the point where he took this step (June 23rd) was afterwards built Alexandria Fort, named after the explorer. Leaving the great river, the party crossed the country to what Mackenzie called the West Road River. For this land journey, begun on July 4th, the explorers were provided with food. After sixteen days of a most toilsome journey, they at length came upon an arm of the sea. The Indians near the coast seemed very troublesome, but the courage of Mackenzie never failed him. It was represented to him that the natives "were as numerous as mosquitoes and of a very malignant character." His destination having been reached, the commander mixed up some vermilion in melted grease and inscribed in large characters on the south-east face of the rock, on which they passed the night, "Alexander Mackenzie, from Canada, by land the twenty-second of July, one thousand seven hundred and ninety-three."