Note 270 — OREGON MISSIONS AN OUTLINE SKETCH OF OREGON TERRITORY AND ITS MISSIONS (continued 3)
Reading edition
The Dalles of the Dead was an especially dangerous place on the upper Columbia. Probably they took their name from the sad fate of a party who turned back from Boat Encampment in 1817. See Ross Cox, Adventures on the Columbia River (New York, 1832), p. 245.—Ed.