“Half dazed, I went into the station and asked about the morning train. There would be one to Reading in less than an hour. The same porter was on duty, I found, as had been there when I arrived. I inquired of him whether he had ever heard of Colonel Lysander Stark. The name was strange to him. Had he observed a carriage the night before waiting for me? No, he had not. Was there a police-station anywhere near? There was one about three miles off.

“It was too far for me to go, weak and ill as I was. I determined to wait until I got back to town before telling my story to the police. It was a little past six when I arrived, so I went first to have my wound dressed, and then the doctor was kind enough to bring me along here. I put the case into your hands and shall do exactly what you advise.”

We both sat in silence for some little time after listening to this extraordinary narrative. Then Sherlock Holmes pulled down from the shelf one of the ponderous commonplace books in which he placed his cuttings.

“Here is an advertisement which will interest you,” said he. “It appeared in all the papers about a year ago. Listen to this: ‘Lost, on the 9th inst., Mr. Jeremiah Hayling, aged twenty-six, a hydraulic engineer. Left his lodgings at ten o’clock at night, and has not been heard of since. Was dressed in,’ etc., etc. Ha! That represents the last time that the colonel needed to have his machine overhauled, I fancy.”

“Good heavens!” cried my patient. “Then that explains what the girl said.”