There was one way, he thought--the police. Some shrewd officer might make something out of this narrative and trace the house; but he felt that it was doubtful, and shrank from laying bare a mystery which he felt sure Marion was eager to keep hidden. Finally he came to the conclusion that he would know no rest until he had discovered the place of his strange imprisonment himself, and in despair, to relieve the pressure of his brain, he turned to the writing-table, which was pretty well covered with letters from patients, complaining that they had come up to find him away; from others asking him to make appointments; and again others of a tendency which showed him that he was injuring his practice. Lastly, he picked up a letter which he had put aside, unwilling to open it; and he held it for some minutes, gazing straight before him, thinking deeply, and seeming to lack the resolution to read. At last with a sigh he tore it open. It was from Isabel's mother, telling him that her child was heart-broken, and asking him to give some explanation of the cruel treatment to which they had been subjected. "Let them think the truth," he cried passionately as he tore the letter into tiny fragments. "Let them think me half mad, I cannot--I dare not write." There were two or three packets on the table, even then, and he winced as he turned them over. One was a bundle of proofs of an article he had written for a medical paper; the next was a carefully-sealed box, registered, and he threw it into a drawer with an angry ejaculation. It was from a jeweller, and contained a pearl bracelet he had bought as a present for his betrothed. The other was also a box that had come by post, registered, and it was heavy. He did not know what that was; he had ordered no other present, and his curiosity being excited, he cut the green tape, tore off the great seals, and was in the act of opening the cartridge paper in which it was folded, when he stopped and snatched up the tape to which the sealing-wax adhered. There were three seals, two the coarse splotches of common wax used by postal authorities; the other was fine and had been sealed with arms and crest, but a drop from the coarse postal wax had half covered it and Chester could make nothing of the sender. The box within was fastened down with brads, and he forced it open with some curiosity, to find a heavy packet of what seemed to be short, thick pieces of pipe, and with a vague idea that they were connected with some surgical instrument sent to him from the maker on trial, he pushed it aside impatiently, and threw himself back in his chair.