Gregofacsimil + verse by Sandhofe + rsigns according to H

Note : I consider that the differences in text from the Breviary are minor enough to be acceptable in order to not alter the piece as found in ancient mss.

Added neumes for the verses : from the ms (though the text is different) for V1, from the generic GP for the GP

Episemated a ql!vssu because those are quilismated toS