Randolph turned pale and leaned against the partition for support. Mr. Barnes became slightly excited and said:
"That amounts to a tacit acknowledgment of guilt, since every other man has been searched."
Mr. Mitchel's reply to this was even more of a surprise than what he had said before.
"That alters the case. If every one else has submitted, so will I." Without more ado he divested himself of his clothing. Nothing was found. The satchels of both men were brought, but the search was fruitless. The conductor glanced at the detective helplessly, but that gentleman was looking out of the window. One who knew Mr. Barnes could have told that he was fearfully angry, for he was biting the end of his moustache.
"Here we are at the Grand Central," said Mr. Mitchel. "Are we at liberty to leave the train?" Receiving an acquiescent nod the two friends walked to the other end of the coach. Mr. Barnes abruptly started up and without a word jumped from the train as it slowly rolled into the great depot. He went up to a man quickly, said a few words in an undertone, and both went back towards the train. Presently the woman who had been robbed came along, and as she passed out of the building Mr. Barnes's companion followed her. He himself was about to depart, when, feeling a light tap upon his shoulder, he turned and faced Mr. Mitchel.
"Mr. Barnes," said the latter, "I want a few words with you. Will you breakfast with me in the restaurant?"
"How did you know that my name is Barnes?"
"I did not know it, though I do now"; and he laughed in a complacent manner which jarred on Mr. Barnes. The detective felt that this man was getting the best of him at every turn. But for all that he was only the more determined to trap him in the end. Accustomed to think quickly, he decided to accept the invitation, considering that he could lose nothing and might gain much by a further acquaintance. The two men therefore went below to the eating-room, and seated themselves at a small table. After giving the waiter a liberal order, Mr. Mitchel began:
"Won't it be best for us to understand one another from the outset, Mr. Barnes?"
"I don't know what you mean."
"I think you do. You asked me a moment ago how I knew your name. As I said, I did not know it, though I suspected it. Shall I tell you why?"
"Certainly, if you wish."
"Perhaps I am a fool to show you your first blunder in this game, since you are evidently enlisted against me; but as I sent my friend off alone, purposely for the chance of doing so, I cannot resist the temptation."
"Stop a moment, Mr. Mitchel. I am not such a fool as you take me to be. I know what you are going to say."
"Ah, indeed! that is clever."
"You are about to tell me that I made an ass of myself when I spoke in the coach upon your refusing to be searched."
"Well, I should not have put it quite so harshly, but the fact is this: When you deliberately followed Randolph into the toilet-room, I became suspicious, being, as I was, at your heels. When the conductor spoke to me, I refused purposely, to watch the effect upon you, with the result, as you now see, that I had my suspicion confirmed. I knew that you were a detective, and, that point gained, there was no further reason for refusing the conductor."
"As I said, I acted like an ass. But I did not need this warning. It will not occur again, I assure you."
"Of course I see now that you overheard our conversation last night, and such being the case you naturally suspected me of this robbery. But I am wondering, if you did overhear our talk, why you did not watch me all night." To this Mr. Barnes made no reply. "I have one favor to ask."
"What is it?"
"That you reveal to no one the fact that I have undertaken to commit a crime. You of course are at liberty to play the ferret, and convict me—if you can."
"As surely as you commit a crime, so surely will I convict you of it," replied Mr. Barnes. "It will be perhaps to my interest to keep what I know to myself, but it will not do to make any promises to you. I must be free to act as circumstances direct."
"Very good. I will tell you where I am stopping, and I give you permission to call to see me whenever you please, day or night. I have a suite of rooms at the Fifth Avenue. Now let me ask you one question. Do you think that I committed this robbery?"
"I will answer you with a question. Did you commit this robbery?"
"Capital. I see I have a foeman worthy of my steel. Well—we will leave both questions unanswered, for the present."
CHAPTER III.
MR. BARNES DISCOVERS AN ARTISTIC MURDER.
Whilst the meal was progressing, a man silently passed through the room. No one would have guessed that he had any special motive in doing so, for he noticed no one. Neither would one have supposed that Mr. Barnes observed him, for he had his back turned. Yet this was the same individual who upon his instruction had followed Rose Mitchel when she left the train.
Breakfast over, the two men started to leave the restaurant. Reaching the stairway which leads above to the main floor, Mr. Barnes courteously stood aside to allow his companion to ascend first. Mr. Mitchel, however, with a wave of the hand, declined, and followed Mr. Barnes. Whether either had any special design in this was a thought occupying the minds of both as they silently passed up-stairs. Mr. Mitchel had a slight advantage, in that being behind he could watch the detective. There seemed, however, to be little to see. To be sure the man who had passed through the restaurant was idly leaning against the doorway, but as soon as Mr. Barnes's head appeared, and certainly before he could have been noticed by Mr. Mitchel, he stepped out into the street, crossed over, and disappeared into the bank building opposite. Had any signal passed between these two detectives? Mr. Mitchel, despite his shrewdness in sending Mr. Barnes up-stairs ahead of him, saw none, yet this is what occurred: Mr. Barnes said adieu, and walked away. Mr. Mitchel stood in the doorway, gazing after him till he saw him enter the elevated railroad station; then, looking carefully about, he himself walked rapidly towards Sixth Avenue. He did not glance behind, or he might have seen the man in the bank step out and walk in the same direction. They had been gone about five minutes when Mr. Barnes once more appeared upon the scene. He stopped in the doorway, where the other detective had been leaning. Keenly scanning the panelling, his eye presently rested upon what he was seeking. Faintly written in pencil were the words "No. ——East Thirtieth." That was all, but it told Mr. Barnes that Rose Mitchel had been followed to this address, and as it tallied with that which she herself had given to him, he knew now that she could be found when wanted. Wetting his finger against the tip of his tongue, he drew it across the words, leaving nothing but a dirty smudge.
"Wilson is a keen one," thought the detective. "He did this trick well. Saw my nod, wrote that address, and got out of sight in an instant. I wonder if he can keep an eye on that shrewd scoundrel? Pshaw! I am giving the fellow too much credit. I must leave it to Wilson for to-day anyway, as I must get through with this Pettingill matter." Half an hour later he was at head-quarters talking with his assistants.
Meanwhile Wilson followed Mr. Mitchel to Broadway then down to the Casino, where he stopped to buy tickets; then out again, and down Broadway to the Fifth Avenue Hotel, which he entered. He nodded to the clerk, took his key, and passed up-stairs. Evidently he lived there. Wilson of course had no further definite instructions. From Mr. Barnes's backward nod, he had understood that he was to shadow this man, and under the circumstances it was his simple duty to do this until relieved by further orders. In these days of telephones it is easy enough to make hurried reports to head-quarters and then continue the pursuit. The Fifth Avenue is not a promising place in which to watch a man, provided the man knows that he is