IIRC, he jotted down about 10 lines of a projected tale in which Huck returns as a senile old man, not realizing that he's been gone from St. Petersburg for decades, and begins asking around for their old friends; after which sad scene, Tom is located and calms him down, comforting him ... And that's all. Where did I read that? It's not in anything I have on my shelf, except possibly the (full) Autobiography? Thanks for any and all pointers. /DDD