Nellie B. Pipes, Oregon Historical Quarterly/Volume 27… (1926)
“ Warre and Vavasour were British officers sent on a secret mission by their Government to "obtain a general knowledge of the capabilities of the Oregon territory in a military point of view, in order that we may be enabled to act immediately and with effect in defense of our rights in that quarter, should those rights be infringed by any hostile aggression or encroachment on the part of the United States.'" Wilkes, Charles. Report on the Territory of Oregon, 1842. Vol. 12, pages 269-299. Sept. 1911. ”
