with what appears to be sulphate (?) of lime and flowers of
sulphur mixed. Exhalations are rising from all parts of the ground at
times, the odor of brimstone being quite strong; but the volcanic action
in this vicinity is evidently decreasing.

About half way up the deposit on the mountain side a number of small
rivulets take their rise, having sulphur in solution, and farther down
the mountain and near the base are the dry beds of several streams from
ten to twenty feet in width which bear evidence of having at some time
been full to the banks (two or three feet deep) with sulphur water. The
small streams now running are warm.

The side of the mountain over which we rode, seems for the most part to
be hollow, giving forth a rumbling sound beneath the feet, as we rode
upon the crust, which is very strong. In no instance did it give way as
did the crust at "Crater hill," under which the fires were raging,
though the incrustation appears to be very similar, abounding in vents
and fissures and emitting suffocating exhalations of sulphur vapor.

On the sides of the mountain were old fissures, surrounded by rusty
looking sulphur incrustations, now nearly washed away. The whole
mountain gives evidence of having been, a long time ago, in just the
same condition of conflagration as that in which we found "Crater hill;"
but all outward trace of fire has now disappeared, save what is found in
the warm water of the small streams running down the sides.

Our course for the past two days has been in nearly a south-southeast
direction, or about parallel with the Wind river mountains. We have
to-day seen an abundance of the tracks of elk and bears, and
occasionally the track of a mountain lion.

Wednesday, September 7.--Last night when all but the guards were asleep,
we were startled by a mountain lion's shrill scream, sounding so like
the human voice that for a moment I was deceived by it into believing
that some traveler in distress was hailing our camp. The stream near the
bank of which our camp lay, flows into the southeast arm of Yellowstone
lake, and for which the name "Upper Yellowstone" has been suggested by
some of our party; but Lieutenant Doane says that he thinks he has seen
on an old map the name "Bridger" given to some body of water near the
Yellowstone. We tried to cross the river near its mouth, but found the
mud in the bed of the stream and in the bottom lands adjoining too deep;
our horses miring down to thei