From Miguel de Cervantes' classic 1605 novel Don Quixote:
"Seest thou not yon cavalier who cometh toward us on a dapple-grey steed, and weareth a golden helmet?"
"What I see," answered Sancho, "is nothing but a man on a grey ass like my own, who carries something shiny on his head."
"Just so," answered Don Quixote: "and that resplendent object is the helmet of Mambrino."
Tags: Cervantes, Don Quixote