Istorum est enim*

Source: 
Praha (Prague), Národní knihovna České republiky (National Library), VI.E.4c
Folio: 
101r
Sequence: 
15
Feast: 
Oct. Nat. Innocent.
Office/Mass: 
V
Genre: 
A
Position: 
M
Cantus ID: 
003451
Manuscript Reading Full Text (standardized spelling): 
Istorum est enim*