Petrus autem servabatur in

Source: 
Worcester, Cathedral - Music Library, F.160 (olim 1247) (with hymnal)
Folio: 
235r
Sequence: 
30
Feast: 
Vincula Petri
Office/Mass: 
M
Genre: 
A
Position: 
2.1
Cantus ID: 
004286
Mode: 
1
Differentia: 
1
Differentia database: 
1--h-h-g-f-gh-g--4 66d
Addendum: 
P: 340