“He might,” answered Mr. Allison, after a pause, and as if he was disinclined to concede that my theory was the correct one. “He might,” I repeated ironically, “and he might not. I should say the latter was far and away the most probable. The thief who has stolen your samples stole your keys first of all in London or elsewhere.” “He couldn’t have stolen them elsewhere,” he interrupted, “because I did not stop anywhere; and I am absolutely convinced they could not have been stolen while I was travelling.” “Very well then, they were stolen in London by some one acquainted with your movements, and that somebody followed you here, waited his opportunity, and so relieved you of the property. Now, you say that you telegraphed to your wife, under the impression that you had left the keys on yo

