“Yes, on every floor.”

“Have they accomplished anything?”

“So little, Mr. Carter, that we put the case into the hands of half a dozen headquarters men about two months ago. Their work has been equally futile. Not a piece of the stolen goods has been traced. Not a clew has been found pointing to the identity of the crooks, or the way in which the thefts were committed.”

“That seems very strange,” Nick remarked.

“Strange is right, chief, and then some,” put in Patsy. “There must be a bunch of clever ginks at work along new and original lines.”

“That seems to be about the size of it,” Nick added.

“And that is precisely how the matter stands,” Frank Mantell continued. “As I said in the beginning, Mr. Carter, you are the man of last resort. All others have failed, and we now turn to you for advice and assistance. I think we should have done so at the outset. It would have saved us a barrel of money.”

“You seem to feel sure that I shall succeed in solving the mystery,” smiled Nick.

“Frankly, Mr. Carter, I do,” Mantell rejoined. “Success seems to be one of your invariable acquirements. I feel that it will prove so in this case.”

“Providing I decide to take the case.”