Instabat enim precibus diebus

Source: 
Worcester, Cathedral - Music Library, F.160 (olim 1247) (with hymnal)
Folio: 
209v
Sequence: 
13
Feast: 
Gregorii
Office/Mass: 
M
Genre: 
A
Position: 
1.2
Cantus ID: 
202576
Mode: 
2
Differentia: 
1
Differentia database: 
1--f-f-f-e-cd-d--4 152c
Addendum: 
P: 287