|The Western Seaboard after the Treaty of Oregon|
London & Edinburgh: A. Fullarton & Co., c.1850. A map of the Pacific coast of the United States, published just after two important treaties: the Treaty of Oregon that decided the 49th Parallel as the border between the US and Canada, 1846; and the Treaty of Guadalupe-Hidalgo that fixed the US-Mexico border, 1848, in which Mexico ceded California and New Mexico and recognized the Rio Grande as the southern and western boundary of Texas. Both are marked on the map. There is also a note 'The Navigation of the Oregon River is free to all British Subjects'.