Add TWICE UPON A TIME by Allen Appel, a time travel novel with two parallel plot strands. The one revolves around the main character's appearance at the 1876 Philadelphia Centennial exhibit where he takes a job as a chair pusher and lives with a black man. The main character agrees to help two captive Indians who are on display escape back to the west and he enlists SLC to aid him. Custer also makes an appearance as a character. He has been resurrected nearly as many times as SLC. Alan C. Reese