The fact that you couldn't see Alfred Hitchcock's first film The Mountain Eagle, or that you couldn't see so many of F.W. Murnau's masterpieces, or that you couldn't see so many of Oscar Micheaux's really intriguing race melodramas, made with fierce independent spirit against all odds in '20s and '30s America. That stuff haunted me. They really did bring to life a sense of 20th Century history: cultural history, pop history, gender politics and race politics, socio economic history, all that stuff. It was bracing and instructive.