Felix namque es sacra virgo

Source: 
Kraków, Klastor OO. Karmelitów na Piasku (Carmelite Convent), Ms.3 (rkp. Perg. 15)
Folio: 
148r
Sequence: 
6
Feast: 
Nativitas Mariae
Office/Mass: 
M
Genre: 
A
Position: 
3.3
Cantus ID: 
002860
Mode: 
4
Differentia: 
E01
Differentia database: 
1--h-g-h-jh-gf-e--4 19a
Addendum: 
248