Omoo: A Narrative of Adventures in the South Seas is the second book by American writer Herman Melville, first published in London in 1847, and a sequel to his first South Sea narrative Typee, also based on the author's experiences in the South Pacific. After leaving the island of Nuku Hiva, the main character ships aboard a whaling vessel that makes its way to Tahiti, after which there is a mutiny and the majority of the crew are imprisoned on Tahiti.In the Preface to Omoo, Melville claimed to have written "from simple recollection" strengthened by his retelling the story many times before family and friends. Yet a scholar working in the late 1930s discovered that Melville had not simply relied on his memory and went on to reveal a wealth of sources. Later, Melville scholar Harrison Hayford made a detailed study of these sources and, in the introduction to a 1969 edition of Omoo, summed up the author's practice: "He had altered facts and dates, elaborated events, assimilated foreign materials, invented episodes, and dramatized the printed experiences of others as his own. He had not plagiarized, merely, for he had always rewritten and nearly always improved the passages he appropriated." Hayford showed that this was a repetition of a process previously used in Typee, "first writing out the narrative based on his recollections and invention, then using source books to pad out the chapters he had already written and to supply the stuff of new chapters that he inserted at various points in the manuscript."