The Six Napoleons
It was not unusual for Mr. Lestrade of Scotland Yard, to visit us sometimes in the evening. Sherlock Holmes welcomed his visits, because they enabled him to keep in touch with all that was going on at the police headquarters. In exchange for the news which Lestrade would bring, Holmes was always ready to hear the details about any case which the detective was investigating. Though he did not interfere with the cases, he had a great deal of knowledge and experience, and was sometimes able to give a helpful hint or suggestion.