"Yes, sir; I thank you for taking it up. It takes a load off my mind to know you're in charge, Inspector. If there's harm come to the master, I'm sure you'll track the party down. Good morning, sir."

"Good morning, Williams."

After the departure of Williams, the detective sat still for several minutes, lost in thought. He was weighing two ideas. He seemed still to hear the words which Mr. Mitchel had uttered after his success in unravelling the mystery of Mr. Goldie's lost identity. "Next time I will assign myself the chief rôle," or words to that effect, Mr. Mitchel had said. Was this disappearance a new riddle for Mr. Barnes to solve? If so, of course he would undertake it, as a sort of challenge which his professional pride could not reject. On the other hand, the cable despatch and the missing coat of mail might portend ominously. The detective felt that Mr. Mitchel was somewhat in the position of the fabled boy who cried "Wolf!" so often that, when at last the wolf really appeared, no assistance was sent to him. Only Mr. Barnes decided that he must chase the "wolf," whether it be real or imaginary. He wished, though, that he knew which.

Ten minutes later he decided upon a course of action, and proceeded to a telegraph office, where he found that, as he had supposed, the despatch had come from the Paris firm of jewellers from which Mr. Mitchel had frequently bought gems. He sent a lengthy message to them, asking for an immediate reply.

While waiting for the answer, the detective was not inactive. He went direct to Mr. Mitchel's house, and once more questioned the valet, from whom he obtained an accurate description of the clothes which his master must have worn, only one suit being absent. This fact alone, seemed significantly against the theory of a visit to friends out of town. Next, Mr. Barnes interviewed the neighbors, none of whom remembered to have seen Mr. Mitchel during the week. At the sixth house below, however, he learned something definite. Here he found Mr. Mordaunt, a personal acquaintance, and member of one of Mr. Mitchel's clubs. This gentleman stated that he had dined at the club with Mr. Mitchel on the previous Thursday, and had accompanied him home, in the neighborhood of eleven o'clock, parting with him at the door of his own residence. Since then he had neither seen nor heard from him. This proved that Mr. Mitchel was at home one day after Williams went to Newport.

Leaving the house, Mr. Barnes called at the nearest telegraph office and asked whether a messenger summons had reached them during the week, from Mr. Mitchel's house. The record slips showed that the last call had been received at 12.30 A.M., on Friday. A cab had been demanded, and was sent, reaching the house at one o'clock. At the stables, Mr. Barnes questioned the cab-driver, and learned that Mr. Mitchel had alighted at Madison Square.

"But he got right into another cab," added the driver. "It was just a chance I seen him, 'cause he made as if he was goin' into the Fifth Avenoo; but luck was agin' him, for I'd scarcely gone two blocks back, when I had to get down to fix my harness, and while I was doin' that, who should I see but my fare go by in another cab."

"You did not happen to know the driver of that vehicle?" suggested Mr. Barnes.

"That's just what I did happen to know. He's always by the Square, along the curb by the Park. His name's Jerry. You'll find him easy enough, and he'll tell you where he took that fly bird."

Mr. Barnes went down town again, and did find Jerry, who remembered driving a man at the stated time, as far as the Imperial Hotel; but beyond that the detective learned nothing, for at the hotel no one knew Mr. Mitchel, and none recollected his arrival early Friday morning.