He spoke without moving his lips and his voice was like a ventriloquist’s. The whisper seemed to be at Nick’s ear, perfectly distinct. And yet a person on the other side of Chick could not have heard it.

“So I perceive,” responded Nick, in the same tone.

Neither gave the faintest sign of having discovered the pursuer.

He was an ordinary-looking young man whom neither of the detectives remembered.

“He does it pretty well,” said Chick, after an instant’s pause.

“Which of us is he after?” said Nick.

“We must find out.”

They paused on the corner of Houston Street and the Bowery and exchanged a few words.

Then Chick went up the stairs to the elevated station, and Nick walked along the Bowery, northward.

The shadow followed Nick.