ave, therefore, reason to believe
that our guns will bear without risk the expansion of the pyroxile gas,
and will give excellent results."

"We shall be a great deal more certain of that when we have tried them!"
answered Pencroft.

It is unnecessary to say that the four cannons were in perfect order.
Since they had been taken from the water, the sailor had bestowed great
care upon them. How many hours he had spent, in rubbing, greasing, and
polishing them, and in cleaning the mechanism! And now the pieces were
as brilliant as if they had been on board a frigate of the United
States' Navy.

On this day, therefore, in presence of all the members of the colony,
including Master Jup and Top, the four cannon were successively tried.
They were charged with pyroxile, taking into consideration its explosive
power, which, as has been said, is four times that of ordinary powder:
the projectile to be fired was cylindro-conic.

Pencroft, holding the end of the quick-match, stood ready to fire.

At Harding's signal, he fired. The shot, passing over the islet, fell
into the sea at a distance which could not be calculated with
exactitude.

The second gun was pointed at the rocks at the end of Flotsam Point, and
the shot, striking a sharp rock nearly three miles from Granite House,
made it fly into splinters. It was Herbert who had pointed this gun and
fired it, and very proud he was of his first shot. Pencroft only was
prouder than he! Such a shot, the honour of which belonged to his dear
boy.

The third shot, aimed this time at the downs forming the upper side of
Union Bay, struck the sand at a distance of four miles, then having
ricocheted, was lost in the sea in a cloud of spray.

For the fourth piece Cyrus Harding slightly increased the charge, so as
to try its extreme range. Then, all standing aside for fear of its
bursting, the match was lighted by means of a long cord.

A tremendous report was heard, but the piece had held good, and the
colonists rushing to the windows, saw the shot graze the rocks of
Mandible Cape, nearly five miles from Granite House, and disappear in
Shark Gulf.

"Well, captain," exclaimed Pencroft, whose cheers might have rivalled
the reports themselves, "what do you say of our battery? All the
pirates in the Pacific have only to present themselves before Granite
House! Not one can land there now without our permission!"

"Believe me, Pencroft," replied the engineer, "it would be be