The Sign of the Four

"The Sign of Four" redirects here. For other uses, see The Sign of Four (disambiguation).
For the Mystical Sign of Four, see Merchant's mark.

The Sign of the Four
One of the coversheets to the original serial publication of the novel in Lippincott’s Monthly Magazine.
AuthorArthur Conan Doyle
LanguageEnglish
SeriesSherlock Holmes
GenreMystery
PublisherLippincott's Monthly Magazine
Spencer Blackett (book)
Publication date
February 1890
Publication placeUnited Kingdom
Media typePrint (Magazine, Hardback & Paperback)
Preceded byA Study in Scarlet 
Followed byThe Adventures of Sherlock Holmes 
TextThe Sign of the Four at Wikisource

How often have I said to you that when you have eliminated the impossible, whatever remains, however improbable, must be the truth?

Sherlock Holmes, Chap. 6, p. 111

The Sign of the Four, also called The Sign of Four, is an 1890 detective novel, and it is the second novel featuring Sherlock Holmes by British writer Sir Arthur Conan Doyle. Doyle wrote four novels and 56 short stories featuring the fictional detective.