struggle to his feet, they saw his hand flash to his pocket, and then he produced a small package and flung it far out over the side.
It had only taken a second, but that second was sufficient to serve for his undoing.
Frank scrambled to his feet in the swaying boat, and for a moment they sparred. Then Frank's right fist shot out and the blow landed directly on the point of the stranger's jaw.
The man was not knocked out, but he staggered back and the wild lurching of the boat sent him off his balance. He stumbled and fell. His head struck against the side of the boat and he crumpled up in a heap.
The blow had knocked him unconscious.
Frank bent over him. He saw that the man was not badly hurt, but that he had been stunned by the impact. He pointed out a coil of rope in the stern.
"Tie his ankles, Joe, in case he wakes up. I've got to get back to the wheel."
The Sleuth by this time was off her course, and was wallowing in the trough of the waves. Quickly, Frank swung the craft about, but when he peered ahead to locate Bayport he gave an exclamation of alarm.
The city was nowhere to be seen. The heavy cloud of mist that had been gathering over the bay now totally obscured the shores.
How far the boat had departed from her
