little cairn of stones. Found also a box of matches, left by one of the men. A portion of the tip of a flint arrow head, & below a stone a living mouse of the short tailed variety. Saw the latter up in one side of field glass. Took bearing on prominent points, & Barometric observations & then descended again to horses. Found it 6 P.M. & little time left to get back. Struggled through windfall & scree & then getting on the grassy slopes got along pretty fast to camp stopping several times for water in the various cold springs. Beautiful sun & purple light on hills.

Geology An examination of rocks in this vicinity explains much previously in doubt. The rocks retain their former position (as seen at E. Butte) eg. dipping away from central igneous masses. Here on the Western flank of Butte they dip W & on its northern flank North was a large mass & probably some smaller portions are however included among the igneous peaks of this West Butte. This detached portion is much more altered than the rest & the greater part of it appears to dip S.Easterly at high angles.

The rocks surrounding the Buttes are not all Lignite tertiary as previously supposed. The lowest beds seen are sandstones either immediately underlying the Sombre clays or intercallated in them. The sombre clays next appear somewhat hardened & more shaly then before. They also