Rameau's musical works may be divided into four distinct groups, which differ greatly in importance: a few cantatas; a few motets for large chorus; some pieces for solo harpsichord or harpsichord accompanied by other instruments; and, finally, his works for the stage, to which he dedicated the last thirty years of his career almost exclusively. Like most of his contemporaries, Rameau often reused melodies that had been particularly successful, but never without meticulously adapting them; they are not simple transcriptions. Besides, no borrowings have been found from other composers, although his earliest works show the influence of other music. Rameau's reworkings of his own material are numerous; e.g., in Les Fêtes d'Hébé, we find L'Entretien des Muses, the Musette, and the Tambourin, taken from the 1724 book of harpsichord pieces, as well as an aria from the cantata Le Berger Fidèle.