Old Roman Chant, the manuscripts

Richard Llewellyn has sent several samples of Old Roman chant manuscripts that are very interesting to look at in detail. As he explained in a comment box on another post, these manuscripts are modern discoveries and many people are working to realize them in some form with the hope of restoration.



And the youtube again, the one that made quite a splash here.

Another piece he sent is the Gradual Tecum Principium



Here is an audio version