Irony is the opposite of what is and what seems to be. Harper Lee uses irony in her novel To Kill A Mockingbird on several occasions to illustrate the difference between appearance versus reality. An example of this is the cementing of the tree. Jem and Scout received many gifts from the oak tree like: chewing gum, a ball of twine, soap carvings of Jem and Scout, a spelling medal, Indian-heads, and a pocket watch. Jem and Scout write the gift-giver a thank you note intending to put it in the tree hole the very next day. When they arrive at the tree they noticed that the hole had been cemented. Jem and Scout asked Mr.