History - Erumpant montes (ad libitum)

Nov 17, 2021 (rleduc)

Added remark on key change and source

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.