| Liturgical fragments in Leuven: Gilbert Huybens |
 | Bifolium of a 12th century Graduale; Lorraine notation on ink staves; contains a series of alleluia chants for male saints. According to Gilbert Huygens it is from an archive in Leuven, so perhaps it may be from Leuven origin. Facs.: Het gregoriaans in de Lage Landen, p. 5) |
| | Bifolium of a 14th century Breviarium. Secular use; Lorraine staff notation |
| | Small and dirty fragment with staffless neumes (?) |