Detective Inspector G. Lestrade, or Mr. Lestrade, is a fictional character appearing in several of the Sherlock Holmes stories written by Arthur Conan Doyle. Lestrade's first appearance was in the first Sherlock Holmes story, the novel A Study in Scarlet, which was published in 1887. The last story in which he appears is the short story "The Adventure of the Three Garridebs", which was first published in 1924 and was included in the final collection of Sherlock Holmes stories by Doyle, The Case-Book of Sherlock Holmes.

"The Adventure of the Six Napoleons", one of the 56 Sherlock Holmes short stories written by Sir Arthur Conan Doyle, is one of 13 stories in the cycle collected as The Return of Sherlock Holmes. It was first published in Collier's in the United States on 30 April 1904, and in The Strand Magazine in the United Kingdom in May 1904.