Quotation from: Secret Adversary

Written by: Agatha Christie

"Good morning," said Tommy amiably. "You have NOT used Pear's
soap, I see."

Conrad growled threateningly.

"No light repartee, have you, old bean? There, there, we can't
always have brains as well as beauty. What have we for lunch?
Stew? How did I know? Elementary, my dear Watson--the smell of
onions is unmistakable."