104 Mackenzie’s Voyages Roderick Mackenzie a second time furthers the plans of his more resourceful cousin by taking charge of Fort Chipewyan during his absence. The three leading canoes entered the Peace at seven in the morning of 12 October, 1792. Mackenzie was struck, as every observant traveller since his time has been struck, with the remarkable richness and fertility of the made land in the angle formed by Peace River, Athabasca Lake, and Athabasca River, totalling perhaps half a million acres. He states that the western end of Lake Athabasca, and Clear Lake and the other small lakes as well, are now so shallow, from the deposition of sediment brought down by the two great rivers, that there is every reason to expect that in a few years they will have exchanged their character and become extensive forests. Travelling rapidly over the waters of the majestic Peace through this fine territory, Peace Point was reached at noon on the thirteenth, and his interpreter tells him that the river derives its name from a peace pact arranged here between the Knisteneaux and Beaver Indians. It appears that the Beaver Indians and the Slaves formerly lived as neighbours around Portage La Loche, or Methye Portage. The Knisteneaux invaded the country from the south and drove both tribes before them northward down Athabasca River and across the lake, where the fugitives separated, the Slaves proceeding farther north down Slave River to Slave Lake, both river and lake taking their names from this event, while the tribe of Beavers went up Peace River closely followed by their enemies. Here the rivals made peace, and this point was settled to be the boundary between them. The weather was cold and raw and Mackenzie knew that it was advisable to hasten as the ice might run any day,