His last novel, Quatre-vingt-treize (Ninety-Three), published in 1874, dealt with a subject that Hugo had previously avoided: the Reign of Terror during the French Revolution.
Jeho posledný román, Deväťdesiat tri (1874) sa zaoberal témou, ktorej sa Hugo predtým vyhýbal – vládou teroru počas Francúzskej revolúcie.