Hérold returned to Paris shortly after the successful production of his first opera, stopping en route in Vienna, where he made many musical acquaintances. Arrived at the French capital he at once made his arrangements for an active and busy season of writing for the stage. His first concern was to find a libretto adapted to his purpose, and it was while engaged in this difficult search that good fortune came to him in the request of Boieldieu that he would write the last half of an opera upon which he was then engaged, “Charles de France,” and which was brought forward in June, 1816. Collaboration of this kind was far from being uncommon at that period, particularly in France. He not only wrote “Charles de France” with Boieldieu, but “Vendome en Espagne” with Auber, and “L’Auberge d’Auray” with Carafa, while in “La Marquise de Brinvilliers” no less than nine composers of prominence were represented—Hérold, Auber, Batton, Berton, Blangini, Boieldieu, Carafa, Cherubini and Paër. The rage for collaboration also spread to literature and has been continued even into our time by Erckmann-Chatrian. The results of such work are more tolerable however in literature than in music, where unity of style is one of the essentials. His association with Boieldieu was of special advantage in introducing him to the theatrical world of writers, and he soon was at no loss to find libretti, good, bad and indifferent, many of them, it must be confessed, of the last two sorts. His first opera after the Boieldieu collaboration was “Les Rosières,” in three acts, (1817), which proved to be a success. Flushed with the prestige of this work the young composer immediately set about another, and before the year closed had finished “La Clochette,” which not only was successful, but as its fresh and taking airs caught the popular fancy, at once made him a favorite in the gay city. His industry now became prodigious. He was seized with the very demon of work and while in this mood he eagerly accepted everything that was offered him in the way of a libretto as affording a new outlet for his musical activity. The result was detrimental. Year after year he produced operas for the stage, some of which had but one or two hearings, while others were vigorously hissed, not on account of the music, but by reason of the weakness and commonplaceness of the stories and their utter lack of dramatic merit. Among such operas were “Le premier Venu” (1818); “Les Troqueurs” (1819); “L’Auteur mort et vivant” (1820); “Lasthénie” (1823); and “Le Lapin Blanc” (1825). Now and then, however, an opera was produced which made compensation for so many failures, and among these was “Le Muletier” (1823), which was highly esteemed, especially by those whose opinions were of value. In fact Hérold had no idle moments. During all of this period, and for two or three years later (1820–29), he was actively connected with the stage. In 1820 he accepted the position of piano accompanist for the Italian