In principio et ante saecula

Source: 
Rome, Santa Sabina, XIV L1 ("Humbert" codex)
Folio: 
238r
Sequence: 
7
Feast: 
Octava Nat. Domini
Office/Mass: 
M
Genre: 
A
Position: 
3.2
Cantus ID: 
003273
Mode: 
8
Differentia: 
G
Manuscript Reading Full Text (standardized spelling): 
In principio et ante saecula deus erat verbum ipse natus est nobis salvator mundi