12 ([return])
[ Many interesting remarks may be found in Vine. Manfredini's Regole Armoniche (Veo., 1797), IV., 6, p. 119, dello stile serio.]
13 ([return])
[ Metastasio, Opp. post., I., p 357.]
14 ([return])
[ J. Brown, Letters upon the Poetry and Music of the Italian Opera (Edinb., 1789), p. 29.]
15 ([return])
[ Goldoni enumerates the practical directions given to him for writing an operatic libretto. Mém., I., p. 102.]
16 ([return])
[ Mancini gives an account of the more important among them. Rifl. prat, sul canto fig., p. 14.]