All the party returned to the chest, which was of an unusually large size.  It was made of oak wood, very carefully closed and covered with a thick hide, which was secured by copper nails.  The two great barrels, hermetically sealed, but which sounded hollow and empty, were fastened to its sides by strong ropes, knotted with a skill which Pencroft directly pronounced sailors alone could exhibit.  It appeared to be in a perfect state of preservation, which was explained by the fact that it had stranded on a sandy beach, and not among rocks.  They had no doubt whatever, on examining it carefully, that it had not been long in the water, and that its arrival on this coast was recent.  The water did not appear to have penetrated to the inside, and the articles which it contained were no doubt uninjured.

It was evident that this chest had been thrown overboard from some dismasted vessel driven towards the island, and that, in the hope that it would reach the land, where they might afterwards find it, the passengers had taken the precaution to buoy it up by means of this floating apparatus.

“We will tow this chest to Granite House,” said the engineer, “where we can make an inventory of its contents; then, if we discover any of the survivors from the supposed wreck, we can return it to those to whom it belongs.  If we find no one—­”

“We will keep it for ourselves!” cried Pencroft.  “But what in the world can there be in it?”

The sea was already approaching the chest, and the high tide would evidently float it.  One of the ropes which fastened the barrels was partly unlashed and used as a cable to unite the floating apparatus with the canoe.  Pencroft and Neb then dug away the sand with their oars, so as to facilitate the moving of the chest, towing which the boat soon began to double the point, to which the name of Flotsam Point was given.

The chest was heavy, and the barrels were scarcely sufficient to keep it above water.  The sailor also feared every instant that it would get loose and sink to the bottom of the sea.  But happily his fears were not realized, and an hour and a half after they set out—­all that time had been taken up in going a distance of three miles—­the boat touched the beach below Granite House.

Canoe and chest were then hauled up on the sands; and as the tide was then going out, they were soon left high and dry.  Neb, hurrying home, brought back some tools with which to open the chest in such a way that it might be injured as little as possible, and they proceeded to its inventory.  Pencroft did not try to hide that he was greatly excited.

The sailor began by detaching the two barrels, which, being in good condition, would of course be of use.  Then the locks were forced with a cold chisel and hammer, and the lid thrown back.  A second casing of zinc lined the interior of the chest, which had been evidently arranged that the articles which it enclosed might under any circumstances be sheltered from damp.