Left to himself Mr. Barnes's thoughts took this form:
"Wilson is no match for Mr. Mitchel, that is evident. I wonder whether there is any real object in this game of hide and seek; or whether it is simply an intimation to me that he cannot be shadowed? If the latter—well, we shall see. Now let me think about those jewels found in New Haven. They tally exactly with the description. Their discovery complicates the case once more. I had almost concluded that those in the safety vaults were the ones stolen, and that as they really belong to Mr. Mitchel, as proven by his receipts, he stole them to win his wager. In this way he ran no risk, since, if the crime were brought home to him, he could not be imprisoned, though he would lose the bet. Now here is another set, evidently the right ones. Mr. Mitchel was plainly surprised at sight of the list which I found. I am sure he did not know of its existence. Therefore he may equally as well have known nothing about this duplicate set of jewels. In that case the occurrence of the train robbery on the very night of the wager, may be simply a coincidence. He says that the dead woman was a blackmailer, and that he gave her the address of his Paris jeweller. May he not have bought his set from that very man, and may not this woman have stolen the duplicate set recently, and brought them to this country? Plainly the Paris jeweller must be looked up. I have his name which I copied from the bill of sale. If this line of argument is true, some one has followed this woman from France, in order to rob her, after allowing her to accomplish the risky business of smuggling. Is that person our friend Thauret? Along this line of argument we arrive at the conclusion that Mr. Mitchel has not yet committed his crime. He hinted that I should remember this if I should exculpate him from those already committed. But do I? Why did he show me that ruby and say that he meant to present it to his sweetheart? Will he give it to her, and then rob her of it? If so, will she be in the plot, and make a hue and cry, so that the papers may make a noise? That was a part of the agreement in making his bet. But after all, what about that button? No explanation explains, which does not throw a light upon that."
Here Mr. Barnes was interrupted by the announcement that Mr. Randolph wished to speak with him. It must be remembered that Mr. Randolph was not aware of the fact that the conversation in the sleeping-car had been overheard. Brought face to face with Mr. Barnes he felt confused, and hesitated.
"Mr. Randolph, I believe," said the detective, glancing at the card which had been sent in. "Be seated. You have come to see me about this Mitchel case?" The rising inflection with which the last word was spoken seemed almost unnecessary to Mr. Randolph. For if the man could ask such a question, he might as well have made it a positive statement. This assumption of knowledge made him more than ever confident of the skill of detectives, and especially of the one before him.
"You know that?" said he. "Would you mind telling me how?"
"We detectives are supposed to know everything, are we not?" This was said with an affable smile, but the answer plainly indicated that Mr. Barnes preferred not to be interrogated. Mr. Randolph therefore concluded to hurry through with his unpleasant business.
"Mr. Barnes, I have a confession to make, and——"
"I must interrupt you, to remind you that whatever you say is unsolicited, and that if you incriminate yourself, the evidence will be used against you."
"Thank you for your warning, but I have come here that I may not be incriminated. The facts in brief are simply these." Then he narrated as accurately as he could recall them, all the circumstances in connection with the wager. Mr. Barnes listened as though it was all a new story to him. He even jotted down a few notes on a bit of paper as though for reference. At the conclusion he said:
"This is a most astounding tale, Mr. Randolph. It is very difficult to believe that a man like Mr. Mitchel, who certainly seems to be a gentleman, would undertake to become a criminal simply to win a sum of money. Now you must have been thinking this over, and if so, you have some explanation to offer. Would you mind telling it to me?"