Now their two captors came quickly over the side and the first turned upon Frank.
"Who were you shouting to?" he demanded.
"Oh, just a friend of mine," replied Frank, with a slight shrug of his shoulders. "He's out there," and the lad waved an arm across the water.
"And what's he doing out there?"
"The same thing we were doing when you found us. Trying to get you fellows."
"Oh, I see," was the reply. "You had us between two fires, eh. It's lucky we put off before you got so close. We heard firing and came back to have a look around."
"Then that's the way you spotted us, eh?" said Frank. "I didn't think you could have got off without my seeing you."
The man made no reply to this, but turned quickly to the other.
"We'll have to get away from here at once, Fritz. Take the wheel."
The latter sprang aft with alacrity, while the first man leaned down and began to tinker with the engine. Frank took a quick step forward and seemed about to leap upon his captor, but the latter turned from the engine and a revolver was in his hand.