warship. The little submarine had taken a position about twenty miles
directly west of the great German stronghold at Heligoland in a lane
likely to be traveled by any outcoming warships.

Executive Officer Cleary, alone in the conning tower, had suddenly
been apprised of the approach of the vessel by a message from the
wireless room. The _Dewey_ was floating in twenty feet of water with
only her periscopes, protruding above the surface. Hardly had he gazed
into the glass before he made out dimly the outlines of the approaching
vessel.

At once the crew was sounded to quarters.

"German raider!" the muffled cry ran through the ship.




CHAPTER V

THE GERMAN RAIDERS


As the _Dewey_ settled into the water. Lieutenant McClure and his
executive officer peered intently though the periscopes, hoping to
catch sight of the unknown craft and speculating on her nationality.
The sky was flecked with clouds and there was no convenient moon
to aid the submarine sentinel---an ideal night for a raid! "Little
Mack," as the crew had affectionately named their commander, was in
a quandary as to whether the approaching vessel was friend or foe.