Si male locutus sum perhibet

Source: 
Montecassino, Monumento Nazionale di Montecassino - Biblioteca, 542
Folio: 
185
Sequence: 
9
Feast: 
Fer. 4 Maj. Hebd.
Office/Mass: 
V2
Genre: 
A
Position: 
5
Cantus ID: 
004900
Mode: 
1
Differentia: 
11
Differentia database: 
1--h-h-g-f-gf-d--4 74c