Prolific French journalist, novelist, and activist (1840-1902) best known as one of the leading figures of naturalism and for his inflammatory 1898 open letter, 'J'Accuse!,' which exposed the anti-Semitism of the French press and government in the infamous Dreyfus Affair. Uncommon 4.25 x 6 cabinet portrait photo of Emile Zola by an unknown Italian photographer, signed and inscribed in black ink, "A Ernesto Conigliani, cordial souvenir, Emile Zola." In fine condition, with a trimmed bottom border. Encapsulated in a PSA/DNA authentication holder.