Now what do you suppose was Tom's object in wasting so much time and energy with his axe and hatchet?
A fireplace.
You will at once understand that the opening which Tom had cut in the tree at the height of twelve or fifteen feet was for the purpose of making a chimney through which the smoke might escape.
The boys kindled a fire, and in a few minutes there was a cheery blaze in their fireplace that lighted up the room and made "everything look just like home," Jim said.
Then Jim went outside and gave a great hurrah of delight when he saw the smoke issuing from the chimney that ingenious Tom had made with his hatchet.
Jim watched the smoke for a few moments, and then walked around the tree to survey the premises. The result of his survey was the discovery of a hollow in the third tree
