Ad hoc tantum sub chlamyde

Source: 
Roma, Biblioteca Vallicelliana, C.5
Folio: 
071v
Sequence: 
9
Feast: 
Fabiani, Sebastiani
Office/Mass: 
M
Genre: 
A
Position: 
1.4
Cantus ID: 
001245
Mode: 
1
Differentia: 
3
Differentia database: 
1--h-h-g-f-gh-gf--4 69b