There was no want of space in the store-rooms of Granite House, but that daytime would not allow them to stow away the whole.  It would not do also to forget that the six survivors of the “Speedy’s” crew had landed on the island, for they were in all probability scoundrels of the deepest dye, and it was necessary that the colonists should be on their guard against them.  Although the bridges over the Mercy were raised, the convicts would not be stopped by a river or a stream and, rendered desperate, these wretches would be capable of anything.

They would see later what plan it would be best to follow; but in the meantime it was necessary to mount guard over cases and packages heaped up near the Chimneys, and thus the settlers employed themselves in turn during the night.

The morning came, however, without the convicts having attempted any attack.  Master Jup and Top, on guard at the foot of Granite House, would have quickly given the alarm.  The three following day—­the 19th, 20th, and 21st of October—­were employed in saving everything of value, or of any use whatever, either from the cargo or rigging of the brig.  At low tide they overhauled the hold—­at high tide they stowed away the rescued articles.  A great part of the copper sheathing had been torn from the hull, which every day sank lower.  But before the sand had swallowed the heavy things which had fallen through the bottom, Ayrton and Pencroft, diving to the bed of the channel, recovered the chains and anchors of the brig, the iron of her ballast, and even four guns, which, floated by means of empty casks, were brought to shore.

It may be seen that the arsenal of the colony had gained by the wreck, as well as the storerooms of Granite House.  Pencroft, always enthusiastic in his projects, already spoke of constructing a battery to command the channel and the mouth of the river.  With four guns, he engaged to prevent any fleet, “however powerful it might be,” from venturing into the waters of Lincoln Island!

In the meantime, when nothing remained of the brig but a useless hulk, bad weather came on, which soon finished her.  Cyrus Harding had intended to blow her up, so as to collect the remains on the shore, but a strong gale from the northeast and a heavy sea compelled him to economize his powder.

In fact, on the night of the 23rd, the hull entirely broke up, and some of the wreck was cast up on the beach.

As to the papers on board, it is useless to say that, although he carefully searched the lockers of the poop, Harding did not discover any trace of them.  The pirates had evidently destroyed everything that concerned either the captain or the owners of the “Speedy,” and, as the name of her port was not painted on her counter, there was nothing which would tell them her nationality.  However, by the shape of her boats Ayrton and Pencroft believed that the brig was of English build.

A week after the castrophe—­or, rather, after the fortunate, though inexplicable, event to which the colony owed its preservation—­nothing more could be seen of the vessel, even at low tide.  The wreck had disappeared, and Granite House was enriched by nearly all it had contained.