Quotation from: The Adventures of Sherlock Holmes

Written by: Sir Arthur Conan Doyle

"'One child--one dear little romper just six years old. Oh, if
you could see him killing cockroaches with a slipper! Smack!
smack! smack! Three gone before you could wink!' He leaned back
in his chair and laughed his eyes into his head again.

"I was a little startled at the nature of the child's amusement,
but the father's laughter made me think that perhaps he was
joking.