Sanctum et verum lumen*

Marginalia: 
B
Folio: 
158v
Sequence: 
8
Feast: 
Office/Mass: 
X
Genre: 
A
Cantus ID: 
004768
Mode: 
4
Manuscript Reading Full Text (standardized spelling): 
Sanctum et verum lumen*
Manuscript Reading Full Text (MS spelling): 
Sanctum et verum lumen
Indexing notes: 
This is probably the Magnificat antiphon for the Second Vespers of the Comm. Apostolorum.