apparent from the fact that the leaders passed back whispered word
to those behind them.

Suddenly a low but distinct moaning sound issued from the recesses
of the cave behind me, and, as it reached the ears of the Indians,
they turned and fled in terror, panic-stricken. So frantic were
their efforts to escape from the unseen thing behind me that one of
the braves was hurled headlong from the cliff to the rocks below.
Their wild cries echoed in the canyon for a short time, and then
all was still once more.

The sound which had frightened them was not repeated, but it had
been sufficient as it was to start me speculating on the possible
horror which lurked in the shadows at my back. Fear is a relative
term and so I can only measure my feelings at that time by what I
had experienced in previous positions of danger and by those that I
have passed through since; but I can say without shame that if the
sensations I endured during the next few minutes were fear, then may
God help the coward, for cowardice is of a surety its own
punishment.

To be held paralyzed, with one's back toward some horrible and
unknown danger from the very sound of which the ferocious Apache
warriors turn in wild stampede, as a flock of sheep would madly
flee from a pack of wolves, seems to me the last word in fearsome
predicaments for a man who had ever been used to fighting for his
life with all the energy of a powerful physique.

Several times I thought I heard faint sounds behind me as of
somebody moving cautiously, but eventually even these ceased, and I