Theory:

"The Adventures of Tom Sawyer" is  a novel written in \(1876\) by the famous author Mark Twain. He was born on \(30\) November \(1835\), and his original name was Samuel Langhorne Clemens. He was an American writer, lecturer, publisher as well as a humourist. He died of a heart attack on \(21\) April \(1910\).
 
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Mark Twain
 
A Note about the Novel

"The Adventures of Tom Sawyer" is a novel about a young boy Tom Sawyer growing up along the Mississippi River at St. Petersburg. Tom Sawyer lives with his Aunt Polly and his brother Sid. He is up to all sorts of mischief. But very cleverly he escapes from the punishments that are given to him. He finds school life miserable. But after Becky Thatcher‘s arrival in town, he is a bit happy to go to school. Even that happiness does not last long as Becky falls ill and does not come to school for a very long time. Bored of school, Tom, with his best friends Joe Harper and Huck runs away to an island in the Mississippi called Jackson’s Island to become a pirate. People in their home town think that they are dead, but to the pleasant shock of everyone they arrive at their own funeral.

"The Cat and the Pain-Killer" is one of the episodes of Tom Sawyer where we find him playing pranks on his Aunt Polly, who loves him very much, but does not show her love outwardly in order to make Tom a good boy.
Reference:
State Council of Educational Research and Training (2019). Term-2 English Standard-9. The Cat and the Pain-Killer--(An Extract from The Adventures of Tom Sawyer) Mark Twain pp. 112-115). Published by the Tamil Nadu Textbook and Educational Services Corporation.