Claim: In the April 23, 1869 premier cast of "Le petit Faust", Anna Van Ghell (a.k.a. Vanghell in France) performed the role Marguerite, while Blanche d'Antigny (model of Émile Zola's "Nana") played as Faust.
Evidence: Roles, voice types, and premiere cast Mephisto (trousers role) Anna Van Ghell 
Roles, voice types, and premiere cast Marguerite Blanche d'Antigny 
Roles, voice types, and premiere cast Faust Hervé (the composer)