Twenty Thousand Leagues Under the Sea the book from the initial concept is a portrait of Tadeusz Kościuszko, a Polish national hero, leader of the uprising against Russia in 1794, with an inscription in Latin: "Finis Poloniae!" ("The end of Poland!"). Margaret Drabble argues that "Twenty Thousand Leagues Under the Sea" anticipated the ecology movement and shaped the French avant-garde. Theodore L. Thomas in 1961 said that "there is not a single bit of valid speculation" in the novel and that "none of its predictions has come true". He described the depictions of the diving gear, scenes, and the "Nautilus" as "pretty bad, behind the times
Jules Verne its combination of adventurous narrative, travel themes, and detailed historical research, would later be described by Verne as "the first indication of the line of novel that I was destined to follow." Dumas fils put Verne in contact with Jules Seveste, a stage director who had taken over the directorship of the Théâtre-Historique and renamed it the Théâtre Lyrique. Seveste offered Verne the job of secretary of the theatre, with little or no salary attached. Verne accepted, using the opportunity to write and produce several comic operas written in collaboration with Hignard and the prolific librettist Michel Carré. To celebrate