He had no business there, but he must do something.
Jimmy turned the cab short and went rattling away down Fifth Avenue to await orders in the lee of a corner a block or so away.

And, meanwhile, as Mr.Wynne still stood on the corner, Mr.Birnes had to go on up the steps.

But as he placed his foot on the third step he knew--though he had not looked, apparently, yet he knew--that Mr.
Wynne had raised his hand, and that in that hand was a small white envelope.

And further, he knew that Mr.Wynne was gazing directly at him.
Now that was odd.

Slowly it began to dawn upon the detective that Mr.Wynne was trying to attract his attention.