Note 73 — COMMENCEMENT OF THE EXPEDITION (continued 3)
Reading edition
The Bighorn is one of the three largest tributaries of the Yellowstone. It rises in the Shoshone and Wind River Mountains, in Wyoming, and following a northerly course enters the Yellowstone at about 46° 15′ north latitude. At its mouth, Manuel Lisa established the first trading post on the Yellowstone (1807). One of its branches has become famous as the scene of the Custer massacre.—Ed.