The Oregon Territory existed from 1848 to 1859. It encompassed present-day Oregon, Washington, and Idaho, as well as parts of what became Wyoming and Montana. Collection consists of a copy of a sketch map of "Oregon Territory, Exhibiting the Location of Various Indian Tribes, the Districts of Country, Ceded by Them, With the Dates of Purchases and Treaties, and the Reserves of the Umpqua and Rogue River Indians."