One of my students who spent some of his early years in England remembers some localities which Twain might have had in mind. South of London, in Surrey, is Horzel Common, where we sometimes went to walk the dog. One feature that I recall is a sandy pit that actually came to mind when I read Connecticut Yankee. Unfortunately there isn't a cave nearby--not that I remember anyway. This pit is also supposedly where H.G. Wells, who lived in Guilford, I think, imagined the alien space ships in War of the Worlds landing. I hope someone can back me up or straighten me out on any or all of this!---Kevin Hagan DAVID TOMLINSON