For detailed discussions see Howard. G. Baetzhold, "Mark Twain and Dickens--Why the Denial?" in _ Dickens Studies Annual_, Vol. 16, New York:AMS Press,1987, pp.189-220 and _Mark Twain and John Bull: The British Connection__ Bloomington & London: Indiana University Press, 1970, See index. Good luck on your project. HGB [log in to unmask]