Exortum est in tenebris lumen

Source: 
Dubrovnik, Franjevački Samostan (Franciscan Monastery), Cod. C Nr. 4
Folio: 
175
Sequence: 
1
Feast: 
Nativitas Domini,8
Office/Mass: 
V2
Genre: 
A
Position: 
3
Cantus ID: 
002794
Mode: 
7
Differentia: 
?
Indexing notes: 
differentia is "l-l-m-l-k-j-[blob];