While I remained there resting, he took a cab and called on the doctor named Barton.

When he returned, he explained that he consulted the doctor, and feigning the symptoms of poisoning which I had explained, the unsuspecting medico had at once remarked that only a few hours before he had been called to a similar case. He suggested to Wyman that perhaps both had eaten something unsound purchased at a shop in the neighbourhood.

Then, after receiving a dose, and being compelled to swallow it in order to keep up the fiction, my friend had commenced to chat with the doctor, and learned that the patient he had been called to was a clean-shaven, middle-aged man who had apparently about nine months ago come to live in Harpur Street. The name he gave was Selby, no profession—at least as far as the doctor knew. He had been struck by his rather mysterious bearing. The little old lady was probably a relation, but of that he was not quite sure. The name I had found in the Directory was that of the present tenant. Wyman had also approached the subject of The Closed Book; but it was apparent that neither Selby nor the doctor suspected that its leaves were envenomed. The patient had made no remark to the doctor about the book. Barton had found him suffering acutely, and betraying all the symptoms of poisoning; but beyond that he knew nothing.

Yet Wyman’s visit had cleared up one or two points, and had given us the name of the man into whose possession The Closed Book had passed.

Presently we went forth again in company, and at the corner of Theobald’s Road found the young Italian still vigilant, although palpably worn out and very hungry. Nothing had transpired, we learned. No one had come out of the house; but the little old lady had come to the door and taken in the milk and bread from the baker. She apparently acted as housekeeper.

We dismissed Enrico for four hours, and I took his place, while Walter Wyman went down to the Naval and Military Club, where he declared he was certain to meet a friend of his who was intimate with Lord Glenelg, and from whom he might obtain some information.

“What connection they have with this affair is a profound mystery,” he remarked; “just as much of a mystery as the fact they are in London when believed to be abroad. Colonel Brock, my friend, only told me the night before last that they were with friends up at Mussooree, in the north of India.”

“Well, it seems they’re back again now,” I remarked.

“So it appears,” was his reply, and he stepped into a hansom and drove down to the club to gather information, leaving me to lounge in the vicinity of that rather dark and cheerless London street.

The weather was damp and muggy, and the continuous traffic in Theobald’s Road jarred upon my nerves. Even in the broad daylight the exterior of the house in Harpur Street was dingy, with an air of distinct mystery. The shutters of the area window remained closed; but the stuffed bear cub had now been removed from the upper window, having served its purpose, whatever that might be.