“Click! Click!”

Two more terrible engines of destruction sped on their way.

Jack sprang back to the bridge to watch the effect of these shots.

And the effects were terrible, as the watchers could plainly make out.

Confusion reigned throughout the German fleet. Not a ship but on which there was panic, and the officers were having serious trouble with the crews.

For there could no longer be any doubt in the minds of the Germans as to the cause of the three terrific explosions that now shattered the stillness of the night.

“Boom! Boom! Boom!” they came, and showers of steel, iron, wood and débris rose high in the air, to be scattered far across the surface of the sea.

Now the searchlights of the uninjured German ships left their sinking sister ships and flashed swiftly across the water. Suddenly the D-16 was lighted up by a circle of light as bright as day.

“We are discovered!” cried Frank, and at the same moment Lord Hastings gave a command:

“Down, quick!”