“Ay, ay, sir,” cried Tom; and, with all the alacrity of man-o’-war’s men, he and his fellows went off with the lantern, and before long had a cask on deck and rolled it up to the hatchway.

“But what for I dunno,” muttered Tom, “unless it’s for a sentry box.”

He soon learned.

“Buckets,” said Mark, laconically; and as soon as these were obtained, though in full expectation of shots being fired through the wooden cover at them, he gave his orders and the chain was rapidly hauled to the deck.

But no shot was fired from below, the Americans evidently expecting that they would be attacked, and reserving their fire for the moment when the chain was all off, and the hatch thrown open.

But as the last link fell off upon the deck two men who were standing ready lifted and banged the empty cask down heavily upon the hatch, a couple of buckets of water were splashed in directly, and then as rapidly as they could be drawn from over the side, others followed and were poured in.

Those below were so puzzled that for a time they remained utterly without movement. Then as the water poured in there was a low whispering, and soon after a heaving up of the hatch a little way, but a man held on to the top of the cask on either side, and their weight proved to be too much for those who tried to heave up the hatch. Ten minutes after, the addition of many buckets of water turned the cask into a ponderous object beyond their strength.

“Right to the brim,” said Mark; and the cask was filled.

“There,” cried Tom; “it would puzzle them to move that.”

The men below evidently thought so too, for they made no further effort, and subsided into a sulky kind of silence, while the chain was run back into the cable tier, and the watch resumed without fresh alarm till morning.