Suddenly, along the deck charged a sturdy figure—a human battering ram. The other men were knocked aside. One of the lookouts was toppled over by the newcomer, falling flat upon his back and was shot by the next plunge of the craft into the scuppers amidships.

"Hi! Hi! Seven Knott!" yelled Al Torrance.

"Good old Colodia! Go to it!" joined in the excited Frenchy.

Philip Morgan was already crouching for a leap. Seven Knott passed him and threw himself upon the unleashed peril that rolled about the deck.

He grasped the cylinder as he fell, but it was snatched out of his arms by the next plunge of the vessel. Seven Knott got to his knees and sought to seize the bomb again when it charged back across the deck.

The thing seemed actually to evade him; and swinging at an unexpected angle as Seven Knott threw himself desperately forward, the heavy cylinder banged the boatswain's mate on the head.

The man was knocked down by the blow. He suddenly straightened out and then relaxed, at full length, upon the sliding deck. Like an inanimate lump his body followed the runaway bomb, but more slowly, to the lower rail.

Again the deck heaved upon that side, and the cylinder roared across it. It missed the unconscious petty officer. At that instant Whistler Morgan made his leap.

He had taken time to study the angle at which the bomb was rolling; he fell upon and grappled it as though it were a football.

"Oh! Oh! Colodia!" yelled his three mates in wild excitement. "Hurray!"