The German eyed Dave Darrin curiously. The American officer's uniform was concealed under his sou'-wester, rubber coat and boots, but after a moment's inspection, the German said curtly:
"You, too, will come aboard."
As refusal would have been absurd under the circumstances Darrin promptly obeyed. Instantly the German officer snatched a fold of Darrin's rubber coat, pulling it aside and thus revealing a glimpse of the uniform beneath.
"Take off that rubber coat!" the Hun ordered, brusquely.
Flushing slightly, Dave obeyed, his uniform now being fully revealed.
"Ha!" snarled the Hun. "I suspected something of the sort. You two will go down through the manhole. And this man and woman are passengers? They will come aboard."
Captain Kennor led the way below, Mr. and Mrs. Launce following. Dave, as he reached the manhole, turned to see the "Rigsdak" vanish beneath the waters.
Then Dave Darrin stepped inside the conning tower and began to descend the ladder—a German prisoner at last!