Mecum est maxima merces tua

Source: 
Worcester, Cathedral - Music Library, F.160 (olim 1247) (with hymnal)
Folio: 
258v
Sequence: 
2
Feast: 
Dionysii
Office/Mass: 
M
Genre: 
R
Position: 
2.1
Cantus ID: 
007138
Mode: 
7
Addendum: 
P: 387