Thirty-five years later, while England was in full possession of Oregon, by a treaty signed in 1818, to run for ten years (and was renewed in 1827 for ten years more), her commissioners claimed that they were "the owners of Oregon by discovery." They argued that "Captain Gray only discovered the mouth of the river, while Captain Vancouver made full and complete discovery"; that "Captain Gray's claim was limited to the mouth of the river, and that he was only a merchant, sailor, and trader, and not a legitimate discoverer, while Captain Vancouver was a commander in his Majesty's navy."
Mark, then, the discovery, in 1792, as the United States' first claim to Oregon. When the United States purchased the claims of France to all the great possession west of the Mississippi River, it was supposed at the time to reach the Pacific Ocean and include the Oregon country, and was so marked on the maps until the publication of the latest government map, which marks "The Louisiana Purchase," reaching only to the Rockies. So, by the after-light of history, we can make no claim to Oregon from that purchase. But President Jefferson, who had a more enthusiastic interest in the Oregon country than did any other of the statesmen of his day, evidently believed his purchase from France included the Oregon country, for he at once began to plan a voyage, for
