The Disappearance of Lady Frances Carfax - Arthur Conan Doyle

“Where is your warrant?”
Holmes half drew a revolver from his pocket. “This will have to serve till a better one comes.”
“Why, you’re a common burglar.”
“So you might describe me,” said Holmes cheerfully. “My companion is also a dangerous ruffian. And together we are going through your house.”

“Should you care to add the case to your annals, my dear Watson,” said Holmes that evening, “it can only be as an example of that temporary eclipse to which even the best-balanced mind may be exposed. Such slips are common to all mortals, and the greatest is he who can recognize and repair them.