The address was only a short distance from the hotel, and Hawley proceeded there on foot, carefully observing the warning which the message had contained to make sure that he was not followed. He had no difficulty in picking out Doctor Gaspard Bonsal’s house, for there was a brass plate on the door bearing that name. This discovery added greatly to his confidence; nevertheless, as he climbed the low stoop and pressed the bell button, he took the precaution of keeping one hand in his coat pocket, with a businesslike grip on the automatic pistol it contained. The door was opened by an aged negro servant, who, without asking any questions, ushered him into a handsomely furnished reception room, and quietly disappeared. A few minutes later, as Hawley was appreciatively studying one of the oil paintings which lined the walls, a gray-bearded, fine-looking old man entered the room. “You are Mr. Hawley?” he inquired. He spoke excellent English, although his appearance was decidedly Latin. “Yes; and I presume I have the honor of addressing Doctor Bonsal?” As Hawley spoke, his hand came out of his pocket; for the sight of this fine, courtly old man removed his last apprehension. Doctor Bonsal bowed. “I must apologize most profoundly for having summoned you here in such a mysterious way,” he said, with a smile, “but I assure you, sir, it was most necessary. The circumstances are such that we cannot be too careful. Had I sent my carriage for you, as I would have liked to do, it might have aroused suspicion.” “That’s all right,” Hawley assured him. “It was only a short walk.” “You are quite sure that you were not followed here?” There was great anxiety in the other’s tone. “Positive. At least, if there were any spies trailing me, I’m satisfied that I’m a good case for an oculist,” said the Camera Chap, with a laugh. “I kept a sharp lookout for them.” “I trust you were not deceived,” remarked Doctor Bonsal gravely. “If you will be good enough, Mr. Hawley, to accompany me into the next room, I think you will immediately realize the wisdom and necessity of these extreme precautions.” He drew aside some sliding doors, and the Camera Chap followed him into the room adjoining. A woman was seated there. She rose as they entered, and, as he gazed into her dark, sad eyes, Hawley gave a start of astonishment. Although he had suspected ever since entering the house that Señora Felix was connected in some way with this mysterious summons, he had not expected to find her there. CHAPTER XV. THE PLEA. Although only a few days had elapsed since the Camera Chap had last seen Señora Felix, he was shocked at the change which had come over her in that time. There were dark circles under her eyes, and her face was drawn and haggard. She seemed to be on the verge of a nervous collapse. “I suppose it is a surprise to you to find me here, Mr. Hawley?” she began, with a pathetic smile.