s there may be some valuable
substance in this volcano, which it will spout forth, and which we may
turn to good account!"

Cyrus Harding shook his head with the air of a man who augured no good
from the phenomenon whose development had been so sudden. He did not
regard so lightly as Pencroft the results of an eruption. If the lava,
in consequence of the position of the crater, did not directly menace
the wooded and cultivated parts of the island, other complications might
present themselves. In fact, eruptions are not unfrequently accompanied
by earthquakes; and an island of the nature of Lincoln Island, formed of
substances so varied, basalt on one side, granite on the other, lava on
the north, rich soil on the south, substances which consequently could
not be firmly attached to each other, would be exposed to the risk
of disintegration. Although, therefore, the spreading of the volcanic
matter might not constitute a serious danger, any movement of the
terrestrial structure which should shake the island might entail the
gravest consequences.

"It seems to me," said Ayrton, who had reclined so as to place his ear
to the ground, "it seems to me that I can hear a dull, rumbling sound,
like that of a wagon loaded with bars of iron."

The colonists listened with the greatest attention, and were convinced
that Ayrton was not mistaken. The rumbling was mingled with a
subterranean roar, which formed a sort of rinforzando, and died slowly
away, as if some violent storm had passed through the profundities of
the globe. But no explosion properly so termed, could be heard. It might
therefore be concluded that the vapors and smoke found a free passage
through the central shaft; and that the safety-valve being sufficiently
large, no convulsion would be produced, no explosion was to be
apprehended.

"Well, then!" said Pencroft, "are we not going back to work? Let Mount
Franklin smoke, groan, bellow, or spout forth fire and flame as much as
it pleases, that is no reason why we should be idle! Come, Ayrton, Neb,
Herbert, Captain Harding, Mr. Spilett, every one of us must turn to at
our work to-day! We are going to place the keelson, and a dozen pair
of hands would not be too many. Before two months I want our new
'Bonadventure'--for we shall keep the old name, shall we not?--to float
on the waters of Port Balloon! Therefore there is not an hour to lose!"

All the colonists, their services thus requisitioned by Pencroft,
descende