"Through an error, ladies and gentlemen, Boat F has already gone. You will please go to the other stations and wait for assignment to the other boats."

The crowd whispered, staring uncomprehendingly at the Captain's stony face.

"Did you ever teach mathematics, Professor?" Alan murmured. "How do you divide fifteen hundred people among four boats?"

Larrabee only smiled, a faraway look in his eyes.

A frightened voice cried, high and loud, "But there won't be enough room!"

Someone screamed. Someone else started to run. In a few seconds a mob of running, panic-stricken people jammed the corridor, fighting their way out. Alan and the professor, an old man and an invalid, had no strength to resist and were helplessly carried along by the living wave.

"Stop those people!" shouted the Captain.

A gun fired into the air and the mob hesitated, then surged on, shouting, past the lounges, to join the throngs waiting at the other stations.

"It's no use," said Evans wearily. "Chief Thayer. Send men to all the stations to guard the boats. You proceed to Boat E and load it first. If any person tries to force his way in, shoot to kill!"