The life of Haydn is, in the main, a plagiarism of G. Carpani's Le Haydine (Milan, 1812). The biographical part of the Mozart, credited by Stendhal to Schlichtegroll, is practically a reproduction of Winckler's Notice biographique sur Jean-Chrysostome-Wolfgang-Théophile Mozart (Paris, 1801) with one anecdote added from another source. The last letter of the Mozart and the letter on Metastasio are by Stendhal. The notice of Mozart, attributed by Muller to C. Winckler, is by T. F. Winckler