Discerne causam meam domine ab

Folio: 
171r
Sequence: 
2
Office/Mass: 
L
Genre: 
A
Position: 
2
Cantus ID: 
002252
Mode: 
7
Differentia: 
B1
Differentia database: 
Manuscript Reading Full Text (standardized spelling): 
Discerne causam meam domine ab homine iniquo et doloso eripe me
Indexing notes: 
has the last note of the differentia (and that of the chant, too) been erased or is it just worn?;