The explorer-geographer David Thompson, working as head of the North West Company's Columbia Department, became the first European to explore the Inland Empire (now called the Inland Northwest). Crossing what is now the Canada–US border from British Columbia, Thompson wanted to expand the North West Company further south in search of furs. After establishing the Kullyspell House and Saleesh House trading posts in what are now Idaho and Montana, Thompson then attempted to expand further west. He sent out two trappers, Jacques Raphael Finlay and Finan McDonald, to construct a fur trading post on the Spokane River, which flows west from Lake Coeur d'Alene to the Columbia River, and trade with the local Indians. This post was established in 1810, at the confluence of the Little Spokane and Spokane rivers, becoming the first enduring European settlement of significance in what later became Washington state. Known as the Spokane House, or simply "Spokane", it was in operation from 1810 to 1826. Operations were run by the British North West Company and later the Hudson's Bay Company, and the post was the headquarters of the fur trade between the Rocky and Cascade mountains for 16 years. After the latter business absorbed the North West Company in 1821, the major operations at the Spokane House were eventually shifted north to Fort Colville, reducing the post's significance.