myself and another community adapted it because the original was deemed by superiors too concerty... so we simplified it and switched some of the parts with the voices so that the top line was for high singers and bottom line for low singers. The original, I have a score of it in classical notation, but I am not sure if I am aloud to share it, if there is a copy right. If anyone is interested you could pm message me and I could email the original to you. Thats all the information I have.

It doesnt say on the top of the page. All I know is the Sister who gave it to me about 15 years ago said, "Its from a medieval manuscript". Thats all I know. She is no longer in my local community, I have contacted her to see if she knows what manuscript its from. I will let you know if I get a response.