NL-SH-ms-155 (olim 72C): Composer name in ms = 'Jo mouton' / Kyrie I: 'Tenor': 'per b mol' / Kyrie II: Modern pencil notations; two bassus parts / [Bassus]: 'Crucifixus tacet' / [Superius]: 'Pleni tacet' / Benedictus: [Superius] and 'Contratenor': 'Duo' / Agnus II: [Superius]: 'Secundu[m] Agnus tacet'; 'Bassus 1', 'Bassus 2'
V-CVbav-ms-Pal.lat.1982: Composer name in ms = 'Jo. Mouton' / 'Pleni su[n]t celi tacet' on blank staves folio / Benedictus: 'Duo' / Agnus II: 'Secundum agnus tacet'