“Jujitsu,” he thought in sudden consternation. Throwing all his strength into an effort to break the man’s grip, he failed. Coughing, trying to breathe, failing, strangling, he felt his strength going when, of a sudden, he caught the sound of a blow, then felt the hated arm relax. Ten seconds more and he was free.

“You—you hit him,” he managed to breathe. “Is he dead?”

“No—no. Watch out!” the girl warned.

Just in time Johnny caught the man. This time, gripping him by collar and trousers, he dragged him from the floor. And then, screaming like some wild thing, the brown man found himself hanging out over an angry sea.

“Johnny, don’t!” The girl’s hand was on his arm.

“Oh, all—all right.”

Swinging the brown man in, he dropped him on the deck. Like a scared rabbit, the intruder went racing off on all fours.

“Now I’ve done it,” Johnny groaned as he dropped back in his place.

“Perhaps,” said Rusty. “Still, you can’t tell.”

CHAPTER XXI
WALL OF GLASS