ually in
the rear, preserving a distance scarcely over three hundred
paces. On one occasion, a bull had approached within
two hundred yards without seeing us, until he ascended
the river bank; he stood a moment shaking his head, and
then made a charge at the column. Several officers
stepped out and fired at him, two or three dogs also rushed
to meet him; but right onward he came, snorting blood
from mouth and nostril at every leap, and, with the speed
of a horse and the momentum of a locomotive, dashed
between two wagons, which the frightened oxen nearly upset;
the dogs were at his heels and soon he came to bay, and,
with tail erect, kicked violently for a moment, and then
sank in death--the muscles retaining the dying rigidity
of tension.

About the middle of July, the command arrived at its
destination--Chouteau's Island, then on the boundary line between the
United States and New Mexico.

Our orders were to march no further; and, as a protection
to the trade, it was like the establishment of a ferry
to the mid-channel of a river.

Up to this time, traders had always used mules or horses.
Our oxen were an experiment, and it succeeded admirably;
they even did better when water was very scarce, which is
an important consideration.

A few hours after the departure of the trading company,
as we enjoyed a quiet rest on a hot afternoon, we saw
beyond the river a number of horsemen riding furiously
toward our camp. We all flocked out of the tents to hear
the news, for they were soon recognized as traders.
They stated that the caravan had been attacked, about
six miles off in the sand hills, by an innumerable host
of Indians; that some of their companions had been killed;
and they had run, of course, for help. There was not a
moment's hesitation; the word was given, and the tents
vanished as if by magic. The oxen which were grazing
near by were speedily yoked to the wagons, and into the
river we marched. Then I deemed myself the most unlucky
of men; a day or two before, while eating my breakfast,
with my coffee in a tin cup--notorious among chemists and