Note 314 — OREGON MISSIONS AN OUTLINE SKETCH OF OREGON TERRITORY AND ITS MISSIONS (continued 4)
Reading edition
The route lay almost directly north from the Yellowstone, along the valley of what is now Shield’s River (named by Lewis and Clark for one of their party), toward the sources of the Musselshell, the largest—with the exception of the Yellowstone—southern tributary of the Missouri. See our volume xxiii, p. 58, note 33.—Ed.