evening, when Dr. Jervis gave me a detailed account of a very strange adventure that befell him. I need not burden you with all the details, but I will give you the substance of his story."
He then proceeded to recount the incidents connected with my visits to Mr. Graves, dwelling on the personal peculiarities of the parties concerned and especially of the patient, and not even forgetting the very singular spectacles worn by Mr. Weiss. He also explained briefly the construction of the chart, presenting the latter for the inspection of his hearers. To this recital our three visitors listened in utter bewilderment, as, indeed did I also; for I could not conceive in what way my adventures could possibly be related to the affairs of the late Mr. Blackmore. This was manifestly the view taken by Mr. Marchmont, for, during a pause in which the chart was handed to him, he remarked somewhat stiffly:
"I am assuming, Dr. Thorndyke, that the curious story you are telling us has some relevance to the matter in which we are interested."
"You are quite correct in your assumption," replied Thorndyke. "The story is very relevant indeed, as you will presently be convinced."
"Thank you," said Marchmont, sinking back once more into his chair with a sigh of resignation.
"A few days ago," pursued Thorndyke, "Dr. Jervis and I located, with the aid of this chart, the house to which he had been called. We found that the late tenant had left somewhat hurriedly and that the house was to let; and, as no other kind of investigation was possible, we
