History - Missus est Gabriel Angelus (t.p. alter tonus)
Feb 06, 2022 (rleduc)
Added to remark about different verse.
remarks
There are 4 copies of this chant in the book at 111,[174],121* and 124*, all slightly different. Variation occurs at Virginem in the last syllable (111=124*,[175]=121*); 121* and 124* have different alleluias, and 111 has the Gloria Patri.
This version also has a different Verse from the other three.