The Oregon question, which now became associated, if not complicated, with the Texas question, originated many years before. By our treaty with Spain in 1819, the southern boundary of our possessions on the Pacific had been accurately defined. Our northern boundary was still unadjusted, and had been matter of dispute with Great Britain ever since we acquired the country. By the treaty of Oct. 20, 1818, the 49th parallel of north latitude was established as the boundary between the United States and British America, from the Lake of the Woods to the Stony Mountains, as the Rocky Mountains were then termed. In the same treaty it was agreed that any country claimed by either the United States or Great Britain westward of the Stony Mountains should, with its harbors, bays, and rivers, be open for the term of ten years to the vessels, citizens, and subjects of either power. This agreement was entered into solely for the purpose of preventing disputes pending final settlement, and was not to be construed to the prejudice of either party. This was the beginning of the joint occupancy of the Oregon country, England having with prompt and characteristic enterprise forced her way across the continent after she had acquired Canada in 1763. Stimulated by certain alleged discoveries of her navigators on the north-west coast, Great Britain urged and maintained her title to a frontage on the Pacific, and made a bold claim to sovereignty, as far south as the mouth of the Columbia River, nearly, indeed, to the northern border of California. OUR CLAIM TO THE OREGON COUNTRY.