13) This is reinforced and made an even more explicitly national affair in the day's proper preface
(one of only five for the year, found in the Communion service), which remembers the coming of the Spirit
I, who could chant the Great Thanksgiving with the proper preface
in my sleep if I'd had to, suddenly had no idea what page we were on, let alone any understanding of the structure of the synagogue service.
Most sources preserve notation only for the common preface, with the expectation that the priest would adapt the music to other approved texts, adding one of the two Proper preface
conclusions ("Et ideo" or "Quem [Quam] laudant") ending with "sine fine dicentes.