horpe's hand was upon the wireless key. He had wanted to warn off the yacht, but not till the thud of the creature on the bare deck proved its reality could he force his cold fingers to press the key.

Then, fast as his inexperience allowed, he called frantically for the Adelaide. He spelled her name, over and over.... Would the sleepy operator never answer?

The Bennington broke in one. "Is that you, Thorpe? What is up?" they demanded.

But Thorpe kept up his slow spelling of the yacht's name. He must get a warning to them! Then he realized that the Bennington could do it better.

"Bennington," he called, "Adelaide approaching. I am attacked. Warn them off. Warn them—" His frantic, hissing dots and dashes died immediately. Beneath his feet the Nagasaki Maru was rolling again, swinging free to the lift and thrust of the swells beneath.

"Good God!" he shouted aloud in his lonely cabin. "It's gone for the yacht. Adelaide—turn north—full speed—" he clicked off on a slow, stuttering key. "Head north. You are being attacked!" He groaned again as he saw the Adelaide's shining ports swing away from the safety of the north; the ship broached broadside to the waves and came slowly to a stop.

"Bennington," he radioed. "Brent—it has got the Adelaide. Help—hurry! I am going over."

He tore wildly at the barred door, and he made a dash across the deck to slip sprawling in a heap against the rail where the slimy traces of the recent visitor stretched glistening on the deck.