“Thank-ye, no, sir, Billy and me lays it down in the dust now and then, and sits on the edge for a rest. We’re doing pretty comfortable, and only wants to get down to the tent to tea.”

“All right, then.”

The darkness increased for a while, and they came dangerously near being struck by stones several times over, but escaped as if by a miracle. Then just as they were approaching one of the worst of the gaps, the cloud of smoke and ashes floated gradually away, they obtained a glimpse of the bright blue sky and were able to cross the crevice in safety, though conscious all the while that a great body of suffocating vapour was now rising from the depths below.

The rest of the descent to the great rift was made in the bright afternoon sunshine, every nerve being strained to get that passed before darkness fell, and as Wriggs, who came last this time, reached the edge where the others were hauling in the line they all set up a hearty cheer, and gathering up the rope, set off as if refreshed, for the dangers of the ascent were at an end.

“An hour will do it,” cried Oliver. “Then a warm bath, a good meal, a night’s rest, and we shall be all right.”

“But we did not get to the top,” said Panton.

“Well, what of that? We’ve found out that we are upon an island, and we have left something else to do another day, for we must get to the edge of the crater before we’ve done.”

“And now what next?” said Drew, as they tramped on down the soft ash bed, after carefully mapping out their course to the hot-spring camp.

“Food and rest.”

“No, no, I mean about our proceedings.”