"Look out," yelled Standish, in accents of alarm.

The fifth man had, unperceived by the defenders, retraced his steps to the fo'c's'le, and now, with a hissing fuse in his hand, was creeping stealthily towards the partly covered main hatch.

"Wing him, or he'll blow the ship to atoms," shouted Smith, as he feverishly thrust fresh cartridges into his revolver. But Armitage had fired his last shot.

The miscreant, knowing by the policeman's shout that he was discovered, bounded over the remaining distance betwixt him and the gaping hold. Then with one foot upon the coaming he raised the lighted fuse. Bang! Bang! Smith's revolver kicked twice in quick succession.

"Got him, by George!" exclaimed the policeman, and the man staggered and clapped his hand to his chest.

But the exclamation of exultation was changed to one of horror as the desperate scoundrel, still grasping the spluttering fuse, lurched forward and disappeared down the hold.

III