Gregofacsimil + neumes from H + according to H. Verse from Vat.lat. 8737 (cf. https://digi.vatlib.it/pub/digit/MSS_Vat.lat.8737/iiif/Vat.lat.8737_0283_fa_0126v.jp2/full/740,/0/native.jpg ) coherent of FCo2. Verse is mode 2 so entire R/ is recategorized as mode 2. Verse neumes and rsigns are completely synthetic.
Corrections suggested by dcrochu