History - Erumpant montes (ad libitum)
Nov 17, 2021 (rleduc)
Added remark on key change and source
remarks
This is an alternative melody from a different manuscript of the same chant immediately prior.
Note the key change for line 2 in the original. I've pushed the change back to the original key by one syllable to break at a word boundary, since line boundaries will not likely align with the source.