Now they were on their way again, and it was growing dark. The closed door still intrigued Harry Vincent, and he watched it more intently than before. He detected a motion. He buried his head suddenly behind his newspaper.

Peering upward over the top of the paper, he saw the door open wide. A man stepped out, turning quickly so that his back was toward Harry, and the door closed. Then the fellow disappeared along the passage that led to the door of the car. Harry dropped his paper and followed. He reached the next car, but no one was in sight when he came to the aisle. He walked through rapidly and entered the second car. By this time he should have gained on the other man. But there was no one in the aisle.

He was puzzled for the moment. Then he retraced his footsteps. It was obvious that the other man had not gone through the train.

When he reached his own car, Harry pushed back the curtain of the smoking compartment and entered.

A man was seated by the window, staring into the outside darkness.

The stranger had assumed a position that confirmed Harry's suspicions. The man had his forehead pressed against the window, with both elbows on the sill, and his hands against his face.

As Harry sat down beside the man and lighted a cigar, the stranger relaxed himself. He did not turn in Harry's direction. But as Harry sat drowsily looking at the floor, he was sure that the other man was studying him in the mirror across the smoking compartment.

Harry spoke without looking at the other man.

"It's a long trip."

"Yeah," confirmed the other.