Haec est quae*

Source: 
Worcester, Cathedral - Music Library, F.160 (olim 1247) (with hymnal)
Folio: 
247r
Sequence: 
22
Feast: 
Nativitas Mariae
Office/Mass: 
V
Genre: 
A
Position: 
3
Cantus ID: 
003001
Mode: 
*
Addendum: 
P: 364