At the Mandan villages in North Dakota, they expelled several British traders, and while talking to the populace they pinpointed the location of the Yellowstone River, which was called Roche Jaune ("Yellow Rock") by the French.
Nas aldeas dos mandan en Dacota do Norte, expulsaron a varios comerciantes británicos, e mentres falaban cos nativos identificaron a localización do río Yellowstone, que foi chamado Roche Jaune ("Roca Amarela") polos franceses.