The young woman with the round mouth gave a little gasp.

A man pacing back and forth in the aisle stopped as if at the point of a bayonet.
It came again.
The heavy-jowled man who had taken the adventure as a jest at first, and who had rolled himself in his great coat like a hibernating woodchuck, unloosed his voice in a rumble of joy.
"It's the whistle!" he announced.

"The damned thing's coming at last!".