The wind blew hard all last night from the S.E. Very cold. Set out early, the wind still hard. Passed a large island in the middle of the river. Opposite the lower point of this island, the Arikaras formerly lived in a large town on the L.S. - remains only a mound, circular, walls three or four feet high. Above the head of the island about two miles, we passed the River Chien, or Dog River [Cheyenne] L.S. This river comes in from the S.W. and is about 400 yards wide. The current appears gentle, throwing out but little sand, and appears to throw out but little water. The head of this river is not known. In the second range of the Cote Noire its course, generally, about east. So called from the Cheyenne Indians who live on the head of it. A part of the nation of Dog Indians live some distance up this river, the precise distance I can't learn. Above the mouth of this river, the sand bars are thick and the water shallow. The river still very wide and falling...

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