I was reading a family history publicaton the other day and came across "The National Fairground Archive" which is a unique collection dedicated to those who made their living as entertainers, fairfolk or show people.
Their address is: Main Library, University of Sheffield, Western Bank, Sheffield. S10 2TN (visits by appointment only)
It was established in 1994 and contains some 80,000 photographs as well as show programmes, posters and charters relating to the numerous shows staged by various entertainment companies.