Treaty between the United States and the Flathead, Kootenay, and Upper Pend d'Oreilles Indians : July 16, 1855, ratified April 18, 1859.
"Concluded at the treaty ground, at Hell Gate, in the Bitter Root valley."
Ratified by the Senate March 8, 1859; signed by President James Buchanan April 18, 1859.
Rights:Washington State University Libraries, Manuscripts, Archives and Special Collections
Source:MASC E99.S2 U65 1859