In the great concourse of the Grand Central Station, Kent moved to and fro, peering into everybody's face.

An official touched him on the shoulder.

"Stop peering into the people's faces," he said.

"I am unravelling a mystery," Kent answered.

"I beg your pardon, sir," said the man, "I didn't know." Kent was here, and everywhere, moving ceaselessly, pro and con, watching for Kelly.