Quando venit ergo sacri

Folio: 
253v
Sequence: 
12
Office/Mass: 
V2
Genre: 
A
Position: 
1
Cantus ID: 
004443
Mode: 
2
Differentia: 
D1a
Differentia database: 
Extra: 
040v
Indexing notes: 
A later hand has added "laudes an" in the left margin.