Triple Chorus system = 4 v. × 3
bar1-13 : A Part, Coro 1 only
bar13-20 : B Part, 3/1 tutti
bar30-33 : C Part, Coro 1 only
bar33-40 : B Part
bar40-57 : D Part, Coro 1 only
bar57-64 : B Part
bar64-68 : Coda
Triple Chorus system = 4 v. × 3