“…In the Old Roman tradition, the care taken in recording the melody is palpably less, and the frequency of variations in the transmission of the same melody is virtually a characteristic. 36 For that reason, the three melodies as they appear in the Unisa Pontifical, are given below: In the pontifical of Durand, the Greek alphabet is given for the bishop who has to trace it with his crozier from the left (i.e. north) eastern corner to the right western corner of the church.…”