Corr II, p.406 Letter from Madame Proust: "I read out your last "Fromentin" about his brother's works to M. Cottet this morning". Note 2. p.407: "Marcel must have written a commentary on the works of the painter Charles Cottet in a pastiche of Maîtres a'autrefois by Eugène Fromentin, a pastiche that he had just written in a letter to his mother."