A domino factum est istud

Source: 
Sankt Gallen, Stiftsbibliothek, 388
Folio: 
131
Sequence: 
9
Feast: 
Gregorii
Office/Mass: 
M
Genre: 
V
Position: 
01
Cantus ID: 
007844a
Mode: 
?
Manuscript Reading Full Text (standardized spelling): 
A domino factum est istud et est mirabile in oculis nostris
Manuscript Reading Full Text (MS spelling): 
A domino factum est istud et est mirabile in oculis nostris
Indexing notes: 
tone resembles mode 4, but this chant is typically mode 6;