sandstone crops out beneath. We ask: "Was the canon cut to its full
depth while yet a Cretaceous sea was depositing beach-sand, and did the
earliest horse, with wings, appear at the close of that period? Or, did
an animal with fore limbs developed, retain its wings into Miocene time
and leave record of its life in an arm of the Tertiary lake?" The body
is that of a horse with wings attached to the shoulders. The head is
unlike that of a modern horse, being much shorter and more rounded, but
the parted lips give a glimpse of the teeth of a young horse. If only
the feet could be found, I feel assured they would prove that the
three-toed horse of ancient time, so abundantly in evidence throughout
this region, was possessed of wings and in some way furnished the idea
of Pegasus.

A few feet further down the canon are a pair of twisted wings that show
the animal to have perished in company with its mate, while trying to
escape from a sudden flood that rushed down the canon like a moving
wall.

After some uneasy discussion about the means of entering the new cave,
it was finally decided that the available rope was too short and not of
sufficient strength. This was, of course, a disappointment but not a
surprise, as a very peculiar quality in the rope used to enter caves of
this kind had come to notice before. The peculiarity is, that a rope
entirely above suspicion for the safety of a two hundred pound man, at
once weakens and must be condemned when threatened with one hundred
pounds of woman's weight, yet there is an implied compliment hidden
somewhere about this protective system that tends to reduce the sting of
disappointment.

So it was agreed to spend the afternoon in the White Onyx Cave, which is
generally spoken of simply as the Upper Cave because it occupies a
higher level than the Onyx Cave already described, and is supposed to be
an extension of the same although no connecting passage has been
discovered.

The accompanying friend had not been costumed for caving, but was
persuaded to accept a full suit of overalls, which needed the addition
of a pick and pipe to make the picture perfect. Unfortunately a snap
shot failed.

The entrance is in a perpendicular portion of the canon wall, but a
narrow path that starts some distance away and appears in eminent danger
of falling off, makes most of the ascent comparatively easy; and the
balance is completed by a short ladder whose rounds dip toward the canon
bed in