During the period covered by this instalment of our list, the accomplishments of the North West Company, both in geographical exploration and in the realization of profits were great. It consolidated its position in the fur-rich Athabasca district and, with a few posts along Mackenzie River, began to draw in the furs of that immense territory. Its traders invaded not only the western part of Rupert's Land but even Hudson Bay itself. The Hudson's Bay Company rose only slowly to the challenge of its formidable rival, but, gradually, it began to adopt new policies and new techniques and to meet the North West Company on its own grounds and on its own terms. Finally, after a bitter struggle that was almost the destruction of both companies, the Hudson's Bay Company, in 1821, effectively absorbed the North West Company in a coalition that gave the older company greater strength than ever and a wider monopoly than Prince Rupert had thought of.