“…It is this infernal St. Simon marriage case. I can make neither head nor tail of the business.”
“Really! You surprise me.”
“Who ever heard of such a mixed affair? Every clue seems to slip through my fingers. I have been at work upon it all day.”
“And very wet it seems to have made you,” said Holmes laying his hand upon the arm of the pea-jacket.
“Yes, I have been dragging the Serpentine.”
“In heaven’s name, what for?”
“In search of the body of Lady St. Simon.”
Sherlock Holmes leaned back in his chair and laughed heartily.
“Have you dragged the basin of Trafalgar Square fountain?” he asked.
“Why? What do you mean?”
“Because you have just as good a chance of finding this lady in the one as in the other.”

– A.C. Doyle, “The Adventure of the Noble Bachelor,” The Adventures of Sherlock Holmes (171)