Travelling British entertainers visited the USA, which developed its own music hall traditions in the form of vaudeville Touring minstrel groups became popular from the middle of the century. Songwriters such as Stephen Foster found their compositions (over 200 hits, including old Folks at Home ‘Camptown Races’ and ‘Beautiful Dreamer’) circulating on an unprecedented scale through the rapidly growing network of theatres. By the turn of the century, Tin Pan Alley (the popular industry) was a name for the Broadway-centered song-publishing reality, and was soon known worldwide as the chief source of US popular music.