I'm working on a paper on Mark Twain and the white minstrel Polk Miller, who played with a black group, The Old South Quartet. I would be interested in anything anybody has on Twain and the minstrelry. In Polk Miller and the group too. I have an uncited reference to MT's calling two of their pieces "magestic earthquakes," and would like to pin that down -- especially which performances. Nickels, Cameron C