"Yes, one was found on the box which Lupin sent back; and the other was found by me and doubtless came from the morocco note-case stolen by the murderer."
"Well?"
"I don't think that they mean anything. What does mean something is the number 813, which Mr. Kesselbach wrote on each of them. His handwriting has been recognized."
"And that number 813?"
"It's a mystery."
"Then?"
"I can only reply again that I don't know."
"Have you no suspicions?"
"None at all. Two of my men are occupying one of the rooms in the Palace Hotel, on the floor where Chapman's body was found. I have had all the people in the hotel watched by these two men. The criminal is not one of those who have left."
"Did no one telephone while the murders were being committed?"