“You are Edith’s husband as well. I will trust everything to you.” “That is good,” said Nick. “Now a practical question. The driver of that coach, who was he?” “The same as my own coachman. I have an arrangement with a livery stable near by, by which I have the same carriage, horses and driver by the month. The carriage is used by no one but me, and the coachman drives nobody but me.” Securing the address of this livery stable and the name of the driver, Nick hurried to the stable, telling Mrs. Constant that he would return soon. He found the driver without difficulty, and from him learned the course taken by Ethel Romney and the places she had called at. The story he told was a straight one. He had been summoned shortly before eight o’clock, and had turned out so quickly that he was at the Constant residence a few minutes before eight o’clock. He had first driven Miss Romney to the dressmaker’s, in Sixth Avenue, where she had got out. She was gone but a few minutes, and, coming out, said that she would have to return to that place. Then she had instructed him to drive to Mr. Carter’s house, where she had seen Mr. Carter without getting out of the coach. After that she had driven back again to the dressmaker’s, where she remained possibly twenty minutes, and, coming from there, she had seemed quite vexed. She told him to drive directly home, and he had followed Sixth Avenue, intending to go up by way of Fifty-ninth Street. She had made no stop on the way thither, and the carriage had not stopped except for a minute or two at Fifty-eighth Street, where the way had been blocked. Arriving in front of the Constant residence, as she made no effort to get out, he had got down to see what the matter was. Then he thought she had fainted, and, making an outcry, people had come from the house. They had carried her in, and he had driven off to the stable. The man, whose name was Rawson, was positive that no man talked to Miss Romney, except Nick himself, during the ride. He was positive that no one had entered the coach with Miss Romney at any time. “Are you certain,” asked Nick, “that while you were standing in front of the dressmaker’s the second time that some one did not enter the coach?” The man replied that he had seen no one attempt to. “But it is possible, isn’t it,” asked Nick, “that a man might have got in there and you not know it?” “It might be, sir,” said Rawson, “but it isn’t likely.” Nick turned away. The man had evidently given all the information he had. He went back to Mrs. Constant, with no light shed on the mystery. CHAPTER XIII. POSSIBILITIES. Nick had summoned his faithful aids, Chick, Ida, and Patsy, to meet him at his apartments on his arrival. He found them awaiting him when he got home, and, without waste of time, sat down to tell them the incidents of the new case they were engaged on.