“Well, Watson, that’s done it,” said Holmes as he fastened the lead to the neck of the excited spaniel. “He thought it was his mistress, and he found it was a stranger. Dogs don’t make mistakes.” “But it was the voice of a man!” I cried. “Exactly! We have added one card to our hand, Watson, but it needs careful playing, all the same.” My companion seemed to have no further plans for the day, and we did actually use our fishing tackle in the mill-stream with the result that we had a dish of trout for our supper. It was only after that meal that Holmes showed signs of renewed activity. Once more we found ourselves upon the same road as in the morning, which led us to the park gates. A tall, dark figure was awaiting us there, who proved to be our London acquaintance, Mr. John Mason, the tr