The first chapter in the volume begins by mentioning Emilio del Cavalieri’s ‘Rappresentatione di anima e di corpo,’ with which the new style of music made its entry into Rome in the year 1600, and then he goes on to show how varied melody, choral polyphony, the lied form, the aria, new tonality, and a feeling for unity were. gradually introduced and developed by such composers as Agazzari, Marco da Gagliano, Stefano Landi (whose works show important advance in form, instrumentation, and characterisation), Michelangelo, Rossi, &c.