reatest of all dangers."

"And what is that?"

"Want of water."

"Well, my dear Henry, it can't be helped. We must put ourselves on
rations."

And on he went.

CHAPTER 17

DEEPER AND DEEPER--THE COAL MINE

In truth, we were compelled to put ourselves upon rations. Our supply
would certainly last not more than three days. I found this out about
supper time. The worst part of the matter was that, in what is called
the transition rocks, it was hardly to be expected we should meet with
water!

I had read of the horrors of thirst, and I knew that where we were, a
brief trial of its sufferings would put an end to our adventures--and
our lives! But it was utterly useless to discuss the matter with my
uncle. He would have answered by some axiom from Plato.

During the whole of next day we proceeded on our journey through this
interminable gallery, arch after arch, tunnel after tunnel. We journeyed
without exchanging a word. We had become as mute and reticent as Hans,
our guide.

The road had no longer an upward tendency; at all events, if it had, it
was not to be made out very clearly. Sometimes there could be no doubt
that we were going downwards. But this inclination was scarcely to be
distinguished, and was by no means reassuring to the Professor, because
the character of the strata was in no wise modified, and the transition
character of the rocks became more and more marked.

It was a glorious sight to see how the electric light brought out the
sparkles in the walls of the calcareous rocks, and the old red
sandstone. One might have fancied oneself in one of those deep cuttings
in Devonshire, which have given their name to this kind of soil. Some
magnificent specimens of marble projected from the sides of the gallery:
some of an agate grey with white veins of variegated character, others
of a yellow spotted color, with red veins; farther off might be seen
samples of color in which cherry-tinted seams were to be found in all
their brightest shades.

The greater number of these marbles were stamped with the marks of
primitive animals. Since the previous evening, nature and creation had
made considerable progress. Instead of the rudimentary trilobites, I
perceived the remains of a more perfect order. Among others, the fish in
which the eye of a geologist has been able to discover the first form of
the reptile.

The Devonian seas were inhabited by a vast number of animals of this
species, which were d