Isti sunt agni novelli qui

Source: 
Worcester, Cathedral - Music Library, F.160 (olim 1247) (with hymnal)
Folio: 
218v
Sequence: 
25
Feast: 
Marci
Office/Mass: 
M
Genre: 
R
Position: 
2.3
Cantus ID: 
007012
Mode: 
7
Addendum: 
P: 305