Qui post me venit ante me

Source: 
Rome, Santa Sabina, XIV L1 ("Humbert" codex)
Folio: 
232v
Sequence: 
10
Feast: 
Fer. 5 Hebd. 2 Adv.
Office/Mass: 
V2
Genre: 
A
Position: 
M
Cantus ID: 
004493
Mode: 
4
Differentia: 
A
Manuscript Reading Full Text (standardized spelling): 
Qui post me venit ante me factus est cujus non sum dignus calceamenta solvere