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posthumous manuscripts
亡き作家の遺稿が書斎から発見された。
The late author's posthumous manuscripts were discovered in the study.
遺稿を整理して一冊の本にまとめた。
The posthumous manuscripts were organized and compiled into one book.
父の遺稿には戦時中の体験が綴られていた。
My father's posthumous manuscripts contained writings about his wartime experiences.