Hive mind question: I have been trying to track down the origin of two settings of Roman Missal antiphons for the Ordination of Priests. I have used them, and I know I originally had them in a square-note notation; I've transcribed and accompanied them for the benefit of other organists. I got them from one of our priests, who got them from someone else, and long story short I can't find where they originated. Anyone know? I'm not seeing them in the RM itself or any appendixes; I know they are not Meinrad. I'd like to acknowledge them properly if possible. Attached here.
FYI: I paired them with my own psalm tones; I'm just asking about the antiphons.
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