Starting points

Lists of Sherlockian societies, maintained by Peter E. Blau
Worldwide Holmesian Photo Gallery
Sherlockian entities on Facebook
Sherlockians Around the World mapping
„Singular sets of people“, an essay about Sherlockian scion societies by Bill Vande Water
One society, in Charleston, West Virginia, extensively explained
A Sherlockian Menagerie
How to Start and Run a Sherlockian Group