“You can’t blame me for that,” returned Billy. “I asked right away if there could be any mistake about the meeting-place and Trevelyan said no. Later he explained that there was another principal entrance, though he didn’t suppose any one would consider it the main one, and he suggested that I wait while he went to look for you at the other entrance and in some of the galleries. He’d been gone about five minutes when I remembered my two hundred dollars, saw through his little game, and started in hot pursuit.”