[4] Duru was working as an engraver when in 1857, in collaboration with his friend from the same quartier, Henri Chivot, they wrote “L'Histoire d'un gilet”, a three-act drame-vaudeville.

[5] The piece played at the Folies-Dramatiques of the Boulevard du Temple, and on 14 November 1857 inaugurated the new theatre on the Rue de Bondy.

[6] He produced almost a hundred comédie en vaudevilles, comedies and operetta libretti, which played successfully on the stages of Paris.

[5] Chivot and Duru were known for the ingenuity of their subjects, fantasy of the episodes, pure comic situations and gaiety of the dialogues.

[9] At his interment at Père Lachaise Cemetery on 31 December 1889, a speech was given on his grave by Armand d'Artois on behalf of the Société des auteurs et compositeurs dramatiques.