The man appeared greatly taken back. "Yes," he said, haltingly. "I wish to see Dr. Hartmann."
"About the snuff box, of course?"
Again the man started. "Who are you?" he asked, suddenly suspicious.
"I am Dr. Hartmann's assistant. He has been waiting for you. You have the box with you, of course?"
The man felt carefully in his pocket, and presently drew out a small object done up in paper. "Yes, I have it. The price was to be twenty-five hundred francs."
"That is correct," remarked the detective. "Give it to me."
Seltz drew back his hand. "I want the money first, and I cannot deliver it to any one but Dr. Hartmann."
"Dr. Hartmann is in the next room," said Duvall, with a pleasant smile. "He has the money all ready for you. I will call him. But first, let me see if you have really secured what we want." He held out his hand. "Don't be afraid," he said. "I shall not leave the room. The box will not be out of your sight."
Seltz appeared to consider the matter for a brief moment, but the detective's manner reassured him. He extended the package toward Duvall. "It is there, all right," he laughed, softly. "And a hard time I had getting it."
Without making any comment, Duvall took the package, quickly tore off the coarse paper wrappings, and saw inside a small round ivory box, its top ornamented with a number of small pearls, arranged in a circular design about its circumference. He glanced swiftly at it, crushed the paper into his pocket, then started toward the door at the rear.