There are no recordings of works by Roy Henry in this catalogue.La Trobe University - Library: Medieval
Music Database - Annual cycle of feasts of
liturgical chant, liturgical polyphony and secular
music of the late middle ages.
Identification of Henry with either Henry IV (r1399-1413) or Henry V (r1413-22) would determine the date of the Old Hall manuscript, if in fact Roy Henry is a monarch at all. Bent tends to favour Henry IV on stylistic grounds.
Gloria from London: British Library, Additional 57950 Sanctus from London: British Library, Additional 57950