 He wrote most of it in a wonderful little octagonal study in Elmira, New York, at a family member's house. I've sat in the ruins of it. It's kind of a moving place to be. Wrote Tom Sawyer there, Prince and the Pauper there. 1876, he knocked out about the first 15 or 16 chapters, put it down, said he thought he might burn the manuscript, picked up a little bit in 1880 to get a couple more chapters ahead, and then he just pushed right through in 1883. That was when he was happiest, writing