Kyrie “Cum jubilo”

Text:
Lord, have mercy upon us.
Christ, have mercy upon us.
Lord, have mercy upon us.
This plainsong Kyrie was adapted into prayer book English by the Rev. Cn. Charles Winfred Douglas in his 1933 Kyrial, a collection of plainsong masses. This particular Kyrie comes from the "Missa marialis," the mass appointed for Marian feast days.
I harmonized this in 2017 for congregational singing at my parish.