J. B. Tyrell, ed., David Thompson: Narrative of his Explorations in Western America, 1784-1812 (Toronto, 1916, 496-97; "Address of Joseph Nathan Teal), The Dalles-Celilo Celebration, Big Eddy, Oregon (May 5, 1915," Oregon Historical quarterly, 16 (Fall 1916), 107-8. (As quoted in "The Columbia River's fate in the twentieth century". Archived from the original on 2016-01-10. Retrieved 2007-04-16.)
J. B. Tyrell, ed., David Thompson: Narrative of his Explorations in Western America, 1784-1812 (Toronto, 1916, 496-97; "Address of Joseph Nathan Teal), The Dalles-Celilo Celebration, Big Eddy, Oregon (May 5, 1915," Oregon Historical quarterly, 16 (Fall 1916), 107-8. (As quoted in "The Columbia River's fate in the twentieth century". Archived from the original on 2016-01-10. Retrieved 2007-04-16.)