After a close examination of the Red River Valley and some geological observations on the west side of Lake Winnipeg, Lefroy made his way to Norway House, and then by the watercourses, four hundred miles, to York Factory. Having done good work on the Bay, he made the return journey to Norway House, and on August 22nd, Cumberland House on the Saskatchewan was gained. Here he adopted the latitude and longitude taken by Franklin's two land expeditions, and here took seven independent observations of variation and dip of the magnetic needle. Now striking energetically northward, and stopping long enough at the posts to take the necessary observations, the explorer arrived at Fort Chipewyan on September 23rd. It was twelve years since the dwellers on Lake Athabasca had been visited by any traveller from the south, and Lefroy's voyageurs, as they completed their three thousand miles of journey, decked out in their best apparel, made the echoes of the lake resound with their gay chansons. Lefroy wintered in the fort, where the winter months were enjoyed in the well-selected library of the Company and the new experiences of the fur trader's life, while his voyageurs went away to support themselves at a fishing station on the lake. The summer of 1843 was spent in a round of thirteen hundred and forty miles, going from Lake Athabasca, up the Peace River to Fort Dunvegan, then by way of Lower Slave Lake to Edmonton, and down the Saskatchewan to Cumberland. Lefroy claims that no scientific traveller had visited the Peace River since the time of Alexander Mackenzie, fifty-five years before. Unfortunately, Lefroy's notes of this journey and some of his best observations were lost in his return through the United States, and could not be replaced. In March, 1844, Lieutenant Lefroy left Lake Athabasca, and travelled on snow shoes to Fort Resolution on Great Slave Lake, and thence to Fort Simpson, four hundred and fifty miles, having his instruments for observation borne on dog sleds. This journey was made in nineteen days. Waiting at the Fort till May, he accomplished the descent of the Mackenzie River after the breaking up of the ice, and reached Fort Good Hope. The return journey to Fort Resolution was made at a very rapid rate, and the route thence to Lake Athabasca was followed. The diary ends June 30th, 1844. At the close of the expedition some misunderstanding arose as to the settlement of the accounts. The Hudson's Bay Company had promised to give "gratuitous canoe conveyance." The original plan of the journey was, however, much changed, and Lieutenant Lefroy was a much greater expense to the Company than had been expected. A bill of upwards of twelve hundred pounds was rendered by the Hudson's Bay Company to the Royal Society. After certain explanations and negotiations a compromise of eight hundred and fifty pounds was agreed on, and this was paid by the Treasury Department to the Company.