foot of the Chimneys?"

"Perhaps yes," replied Pencroft. "At any rate, since we must leave
Granite House for a long expedition, I think the 'Bonadventure' will be
safer here during our absence, and we shall do best to leave her here
until the island is rid of these blackguards."

"That is exactly my opinion," said the reporter. "At any rate in the
event of bad weather, she will not be exposed here as she would be at
the mouth of the Mercy."

"But suppose the convicts pay her another visit," said Herbert.

"Well, my boy," replied Pencroft, "not finding her here, they would not
be long in finding her on the sands of Granite House, and, during our
absence, nothing could hinder them from seizing her! I agree, therefore,
with Mr. Spilett, that she must be left in Port Balloon. But, if on our
return we have not rid the island of those rascals, it will be prudent
to bring our boat to Granite House, until the time when we need not fear
any unpleasant visits."

"That's settled. Let us be off," said the reporter.

Pencroft, Herbert, and Gideon Spilett, on their return to Granite House,
told the engineer all that had passed, and the latter approved of their
arrangements both for the present and the future. He also promised the
sailor that he would study that part of the channel situated between the
islet and the coast, so as to ascertain if it would not be possible
to make an artificial harbor there by means of dams. In this way, the
"Bonadventure" would be always within reach, under the eyes of the
colonists, and if necessary, under lock and key.

That evening a telegram was sent to Ayrton, requesting him to bring from
the corral a couple of goats, which Neb wished to acclimatize to the
plateau. Singularly enough, Ayrton did not acknowledge the receipt of
the despatch, as he was accustomed to do. This could not but astonish
the engineer. But it might be that Ayrton was not at that moment in the
corral, or even that he was on his way back to Granite House. In fact,
two days had already passed since his departure, and it had been decided
that on the evening of the 10th or at the latest the morning of the
11th, he should return. The colonists waited, therefore, for Ayrton to
appear on Prospect Heights. Neb and Herbert even watched at the bridge
so as to be ready to lower it the moment their companion presented
himself.

But up to ten in the evening, there were no signs of Ayrton. It was,
therefore, judged best to send a fre