Missus est angelus Gabriel a

Source: 
Sankt Gallen, Stiftsbibliothek, 388
Folio: 
138
Sequence: 
14
Feast: 
Annuntiatio Mariae
Office/Mass: 
M
Genre: 
A
Position: 
1.1
Cantus ID: 
003793
Mode: 
1
Differentia: 
Ab
Differentia database: 
1--h-h-hg-gf-gh-gfd--4 70b
Manuscript Reading Full Text (standardized spelling): 
Missus est angelus Gabriel a deo in civitatem Nazareth ad virginem desponsatam viro cui nomen Joseph
Manuscript Reading Full Text (MS spelling): 
Missus est angelus gabrihel a deo in civitatem nazareth ad virginem desponsatam viro cui nomen ioseph
Indexing notes: 
mode 1 common for this chant; differentia on this side original hand?