Not without difficulty Hans succeeded in lighting the torch; and the flame, preserving its upward tendency, threw enough light to show us what kind of a place we were in.

“Just as I thought,” said the Professor “We are in a tunnel not four-and-twenty feet in diameter. The water had reached the bottom of the gulf. It is now rising to its level, and carrying us with it.”

“Where to?”

“I cannot tell; but we must be ready for anything. We are mounting at a speed which seems to me of fourteen feet in a second, or ten miles an hour. At this rate we shall get on.”

“Yes, if nothing stops us; if this well has an aperture. But suppose it to be stopped. If the air is condensed by the pressure of this column of water we shall be crushed.”