"He's mad about something," declared Ned.

"It does look so," agreed Rose.

All at once the boys saw Blowitz take a step toward the other man, who
retreated, as if afraid. Blowitz raised his hand as though to give a
blow.

"Look out!" cried Ned involuntarily, as if the man could hear him.
"You'll go over the cliff!"

With a quick motion he turned the boat, steering toward the foot of
the rock, above which the men stood.

At that instant a black cloud came over the moon and the scene was
plunged in darkness. It was just as if it had been blotted out, and a
murmur of surprise, at the suddenness of it, came from those in the
Ripper.

At the same instant a cry rang out-- a man's cry-- and it seemed to be
one for help.

CHAPTER XX

BLOWITZ IS ANGRY

"QUICK!" called Jerry. "Put us over there, Ned!"

"I will! Something has happened. I wonder--"