Virtual Vaudeville is a site in development. You can currently watch a 3D version in a long-gone Keith theater of an actual vaudeville script from 1895. Very cool. There are numerous links to other information about vaudeville, where you can get lost for oh, (9:01 minus 7:49, borrow a six...) at least an hour and twelve minutes, anyway.
Actually, I do time calculations differently, but you really don't want to know.