In medio et in circuitu

Source: 
Arras, Bibliothèque municipale, 893 (olim 465)
Folio: 
451v
Sequence: 
8
Feast: 
Matthaei
Office/Mass: 
L
Genre: 
A
Position: 
B
Cantus ID: 
003257
Mode: 
7
Differentia: 
3
Differentia database: 
1--l-l-lm-l-l-kl--4 147q