d slate rock. There are several sulphur springs at
the mouth of the creek, three of them boiling, others nearly as hot as
boiling water. There is also a milky white sulphur spring. Within one
yard of a spring, the temperature of which is little below the boiling
point, is a sulphur spring with water nearly as cold as ice water, or
not more than ten degrees removed from it.

I went around and almost under the fall, or as far as the rocks gave a
foot-hold, the rising spray thoroughly wetting and nearly blinding me.
Some two hundred yards below the fall is a huge granite boulder about
thirty feet in diameter. Where did it come from?

In camp to-day several names were proposed for the creek and fall, and
after much discussion the name "Minaret" was selected. Later, this
evening, this decision has been reconsidered, and we have decided to
substitute the name "Tower" for "Minaret," and call it "Tower Fall."[G]

General Washburn rode out to make a _reconnaissance_ for a route to the
river, and returned about 3 o'clock in the afternoon with the
intelligence that from the summit of a high mountain he had seen
Yellowstone lake, the proposed object of our visit; and with his compass
he had noted its direction from our camp. This intelligence has greatly
relieved our anxiety concerning the course we are to pursue, and has
quieted the dread apprehensions of some of our number, lest we become
inextricably involved in the wooded labyrinth by which we are
surrounded; and in violation of our agreement that we would not give the
name of any member of our party to any object of interest, we have
spontaneously and by unanimous vote given the mountain the name by which
it will hereafter and forever be known, "Mount Washburn."

In addition to our saddle horses and pack horses, we have another
four-footed animal in our outfit--a large black dog of seeming little
intelligence, to which we have given the name of "Booby." He is owned
by "Nute," one of our colored boys, who avers that he is a very knowing
dog, and will prove himself so before our journey is ended. The poor
beast is becoming sore-footed, and his sufferings excite our sympathy,
and we are trying to devise some kind of shoe or moccasin for him. The
rest to-day in camp will benefit him. Lieutenant Doane is suffering
greatly with a felon on his thumb. It ought to be opened, but he is
unwilling to submit to a thorough operation. His sufferings kept him
awake nearly all of last night