This German-language postcard depicts Alfred Dreyfus (1859–1935) in prison on Devil's island. A gendarme is bringing him the news that his plea for a retrial has been granted and the case will be reopened. The diamond-shaped insert in the upper right-hand corner depicts the prison's watchtower.
H.T., Affaire Dreyfus: Révision du procès Dreyfus, black and white illustrated postcard, 9 x 14 cm, 1898; source: Ville de Paris / BHVP / Roger-Viollet, http://bibliotheques-specialisees.paris.fr/ark:/73873/pf0001481590/0001/v0001.simple.selectedTab=record, public domain.