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State of Oregon, The history of this State properly begins with the discovery of the mouth of the Columbia River by Captain Gray, of Boston, in the ship Columbia, May 7, 1792, who gave the name of his vessel to that river. His report caused President Jefferson to send the explorers Lewis and Clarke (qq. v.) across the continent to the Pacific (1804-6). In 1811 John J. Astor and others established a fur-trading post at the mouth of the Columbia River, and called it Astoria. The British doctrine, always practised and enforced by them, that the entrance of a vessel of a civilized nation, State seal of Oregon. for the first time, into the mouth of a river, gives title, by right of discovery, to the territory drained by that river and its tributaries, clearly gave to the Americans the domain to the lat. of 54° 40′ N., for the discovery of the Columbia River by Captain Gray, in 1792, was not disputed. In 1818 it was mutually agreed that each nation should equally enjoy the pri