Many writers make references to Sir
Arthur Conan Doyle's famous literary creation, the detective
Sherlock Holmes, and these often become embedded within popular culture. While Holmes exists predominately in the context of
Victorian-era London, he has been mentioned in such outre contexts as the 22nd century or hunting aliens or supernatural enemies. The versions of Holmes wearing the
deerstalker hat appear only a few in the original
Strand pictures, as opposed to the far more common
top hat. Holmes frequently says, "Elementary, my dear" to other characters. These references are in addition to the innumerable passing references to Sherlock Holmes made in a very large percentage of all literary and cinematic works, such as the labeling of a person as a "Sherlock", whether in reference to their intelligence (or in jest or sarcasm).