Series. For this musical passage, Stravinsky abandons the rotational array in favor of a four-part array in which P is paired with I (related by inversion around their shared first note, E♯) and R is paired with IR (related by inversion around their shared first note, A♯). All four forms are presented in retrograde order. In the third chord, Stravinsky incorrectly realized IR’s E♯ as G♯. In the final chord, Stravinsky adds G♯ to the array dyad, A♯-E♯. The twelve chords of Stravinsky’s chorale correspond to the twelve vertical slices of the four-part array, although Stravinsky’s melodic lines do not generally track the pitch-class succession of the rows of the array.