Hoc est testimonium quod

Source: 
Oxford, Bodleian Library, MS. Canon. Liturg. 202 (olim 19314)
Folio: 
010v
Sequence: 
8
Feast: 
Fer. 6 Hebd. 3 Adv.
Office/Mass: 
E
Genre: 
A
Position: 
1
Cantus ID: 
003082
Mode: 
?
Differentia: 
*