"Fire!"

It seemed that almost instantaneously with the roar and recoil of the huge gun the shell burst beside the sinking submarine. The explosion was terrific; the whole hull of the undersea boat heaved up, exposing its length for a few seconds. Then the sea-shark sank, going down like a shot.

"A hit! A hit!" yelled the men in turret two.

A cheer burst from the throats of the whole ship's company. Those who had not seen it, realized that the first gun fired in earnest by the Kennebunk had reached its target.

"The old ship's bound to have good luck!" shouted a boatswain. "This is only the beginning! We'll sweep the seas of every Hun!"

The officers did not try to quell the cheering. The satisfaction and pride of all was something too fine to be quenched.

The battleship swerved again and ran across the track of the sunken U-boat. Bubbling up from the depths were blobs of black oil which lazily spread and broke upon the sea's surface.

The German submarine was done for. Her crew were buried with her at the bottom of the sea. The cheering ceased when this fact was realized.

"The poor square-heads!" muttered one fellow near Frenchy and Ikey Rosenmeyer. "They couldn't help it, I s'pose. They say they are driven into the subs. Aren't no volunteers called for."

"Where's that other sub?" demanded another. "Has she sunk, too?"