Gregofacsimil + neumes from H + rsigns according to H (verse included). Verse adaptation from Sandhofe, consistent of FCo2 with a different beginning of the second part of the verse. The verse should probably say "de quo item ait", which is the text given by the germanic tradition outside of H which has another one. DONE: consult non-Hartkerolatrous people.

Sandhofe's adaptation is not great: dcrochu follows FCo2 better. Adopting "enim propheta" from dcrochu in the PR below (along with other changes).

cf. pull request: https://github.com/Nocturnale-Romanum/nocturnale-romanum/pull/138