Complex sentence: The author changed the title at the very last moment in September 1851, and so the work first appeared as "The Whale" in London in October 1851, and then under its definitive title "Moby-Dick" in New York in November.
Split into simpler sentences: The author changed the title at the very last moment in September 1851. The work first appeared as "The Whale" in London in October 1851, and then under its definitive title "Moby-Dick" in New York in November.