Oregon is a part of the North American continent, to which, it is confidently affirmed, the title of the United States is the best now in existence. For the grounds on which that title rests I refer you to the correspondence of the late and present Secretary of State with the British plenipotentiary during the negotiation. The British proposition of compromise, which would make the Columbia the line south of 49°, with a trifling addition of detached territory to the United States north of that river, and would leave on the British side two-thirds of the whole Oregon Territory, including the free navigation of the Columbia and all the valuable harbors on the Pacific, can never for a moment be entertained by the United States without an abandonment of their just and dear territorial rights, their own self-respect, and the national honor. For the information of Congress, I communicate herewith the correspondence which took place between the two Governments during the late negotiation. The rapid extension of our settlements over our territories heretofore unoccupied, the addition of new States to our Confederacy, the expansion of free principles, and our rising greatness as a nation are attracting the attention of the powers of Europe, and lately the doctrine has been broached in some of them of a "balance of power" on this continent to check our advancement. The United States, sincerely desirous of preserving relations of good understanding with all nations, can not in silence permit any European interference on the North American continent, and should any such interference be attempted will be ready to resist it at any and all hazards.