In hoisting the Norwegian flag he was wholly within his rights as a naval commander. Under international law a naval commander is entitled to hoist any neutral or belligerent flag, including even that of the enemy, in order to maneuver into fighting position. But, before he can fire a shot, the commander must hoist the flag that he actually sails under.

In this instance Dan would give the “Prince” the assumed character of a neutral merchant ship that desired to play a humane part. No real Norwegian skipper would have been likely to take such a chance, as it would only have invited the destruction of his craft.

Dawn came quickly now. With the first streaks Dan ran up the signal and sailed daringly in. The submarine, which lay ahead, had ceased firing. The doomed ship took the plunge and vanished, but in three boats and on six rafts a frightened lot of men and women were seeking to get away from Death.

“Lie to and abandon ship!” signalled the German commander, as soon as the presence of the “Prince” was made out.

But Dan, with the range, took the bull boldly by the horns. Opening ports in a jiffy, and with gun crews at quarters on both starboard and port, he gave the firing order.

“Give ’em ‘Chermany over all,’ and put it all over them!” commanded Danny Grin savagely.

Three shells left the starboard battery before the astounded German commander had realized that it was a fighting craft that menaced him.

Two of the shells flew over, striking the water beyond, but the third crashed through the plates of the conning tower, exploding inside and blowing off part of the top of the tower.

No sooner had the guns been fired than Dalzell changed the course to bring the port battery into play.

“Give ’em ‘Chermany over all’ all over again!” roared Danny Grin’s voice. “Oh, it’s a great game, don’d it?”