De illa occulta habitatione

Source: 
Praha (Prague), Národní knihovna České republiky (National Library), XIV.B.13
Folio: 
021r
Sequence: 
5
Feast: 
Vigilia Nat. Domini
Office/Mass: 
M
Genre: 
R
Position: 
1.1
Cantus ID: 
006393
Mode: 
8
Indexing notes: 
this is out of order, but is probably for the first nocturn;