cend on that arid plateau terminated by the strangely-wild
basalt cliff. From time to time one of the colonists stooped down and
felt for the wire with his hands; but there was now no doubt that the
wire was running directly towards the sea. There, to a certainty, in the
depths of those rocks, was the dwelling so long sought for in vain.

The sky was literally on fire. Flash succeeded flash. Several struck the
summit of the volcano in the midst of the thick smoke. It appeared there
as if the mountain was vomiting flame. At a few minutes to eleven the
colonists arrived on the high cliff overlooking the ocean to the west.
The wind had risen. The surf roared 500 feet below.

Harding calculated that they had gone a mile and a half from the corral.

At this point the wire entered among the rocks, following the steep side
of a narrow ravine. The settlers followed it at the risk of occasioning
a fall of the slightly-balanced rocks, and being dashed into the sea.
The descent was extremely perilous, but they did not think of the
danger; they were no longer masters of themselves, and an irresistible
attraction drew them towards this mysterious place as the magnet draws
iron.

Thus they almost unconsciously descended this ravine, which even in
broad daylight would have been considered impracticable.

The stones rolled and sparkled like fiery balls when they crossed
through the gleams of light. Harding was first--Ayrton last. On they
went, step by step. Now they slid over the slippery rock; then they
struggled to their feet and scrambled on.

At last the wire touched the rocks on the beach. The colonists had
reached the bottom of the basalt cliff.

There appeared a narrow ridge, running horizontally and parallel with
the sea. The settlers followed the wire along it. They had not gone a
hundred paces when the ridge by a moderate incline sloped down to the
level of the sea.

The engineer seized the wire and found that it disappeared beneath the
waves.

His companions were stupefied.

A cry of disappointment, almost a cry of despair, escaped them! Must
they then plunge beneath the water and seek there for some submarine
cavern? In their excited state they would not have hesitated to do it.

The engineer stopped them.

He led his companions to a hollow in the rocks, and there--

"We must wait," said he. "The tide is high. At low water the way will be
open."

"But what can make you think-" asked Pencroft.

"He would n