"All that can be done, sir," the famous detective bluntly rejoined. "I accept the case, Mr. Venner, and will do my best with it. When I have anything to report, you shall hear from me."

"But—"

"There really is nothing more to be said, gentlemen, and the sooner I get to work the better," Nick gravely interposed.

"But will you advise me of any steps that you may take?" persisted Venner, briefly detaining him by the arm.

"Very probably," nodded Nick, though really he probably would do nothing of the kind. "And now good-day, gentlemen. If reporters call upon you, you may give them all of the facts, and state that Nick Carter is at work on the case. I want this Kilgore diamond gang to know at the outset that I am after them—and fully resolved to land them where they belong."

"Behind prison bars, eh?" inquired Venner, with an odd smile.

"Yes, sir! Behind prison bars!" declared Nick, forcibly. "Again, gentlemen, good-day. You will hear from me later."

Mr. Rufus Venner, with his partner at his elbow, stood in the office door and silently watched the two celebrated detectives as they strode quickly through the elegant store, from which they presently vanished into Fifth Avenue.

There was a smile of subtle cunning, combined with cruel and malicious determination, on Venner's dark face and he muttered under his breath, as the store door closed upon Nick's imposing figure:

"Hear from you later, eh? Very good. Very good, indeed, Mr. Detective Carter! Hear from you again—that is precisely what I want! Early and often, Detective Carter; early and often, if you please! It is precisely for what the little robbery of this April morning was invented!"