not suggestive that the only time the lodger went out was immediately after his taking the rooms? He came back—or someone came back—when all witnesses were out of the way. We have no proof that the person who came back was the person who went out. Then, again, the man who took the rooms spoke English well. This other, however, prints. ‘match’ when it should have been ‘matches.’ I can imagine that the word was taken out of a dictionary, which would give the noun but not the plural. The laconic style may be to conceal the absence of knowledge of English. Yes, Watson, there are good reasons to suspect that there has been a substitution of lodgers.”
“But for what possible end?”
“Ah! there lies our problem. There is one rather obvious line of investigation.” He took down the great book in which, day by day, he filed the agony columns of the various London journals. “Dear me!” said he, turning over the pages, “what a chorus of groans, cries, and bleatings! What a rag-bag of singular happenings! But surely the most valuable hunting-ground that ever was given to a student of the unusual! This person is alone, and cannot be approached by letter without a breach of that absolute secrecy which is desired. How is any news or any message to reach him from without? Obviously by advertisement through a newspaper. There
