The chimney was close to the trap, and without any great exertion Tommy managed to place the mat over it, precluding the possibility of any smoke escaping.
When this was done, Bobsey hurried him downstairs again into the kitchen.
"I don't want any gratitude," he remarked, "for putting you up to things and making you know the ways of the 'ouse."
"I'm a thousand times obliged to you," replied Tommy, "for keeping me posted."
"I may help you a hundred different ways, but never you tell anyone who it was done it."
"Not I. What do you take me for?" said Tommy. "I'm no slouch."
The bell of the parlor began to ring again furiously, and Tommy prepared to answer it.
"The old duffer wants to thank you," remarked Bobsey. "If he hoffers to make you a present of 'alf a crown, don't you say no."
CHAPTER XII.
AN ARTISTIC CHIMNEY SWEEPING.