Sidera scansurus terrisque

Source: 
Cambridge, University Library, Mm.ii.9
Folio: 
413
Sequence: 
6
Feast: 
Cathedra Petri
Office/Mass: 
M
Genre: 
A
Position: 
2.3
Cantus ID: 
204671
Mode: 
6
Differentia: 
1
Differentia database: 
1--h-h-f-gh-gF-f--4 7e
Extra: 
14