“It isn’t necessary to be in the Secret Service to be a detective,” he snapped.

“Perhaps not. But what service are you in?”

“I have no ties. I am in the business on my own hook!”

“Private detective?”

“Yes.”

“Umph! What is your clew?”

“I got it through a man who is in a position to know all about the case.”

“Who is he?”

“That is my affair.”

“I can tell you who you mean.”