Et omnis mansuetudinis ejus

Source: 
Aachen (Aix-la-Chapelle), Domarchiv, G 20
Folio: 
057r
Sequence: 
1
Feast: 
Fer. 5 per annum
Office/Mass: 
V2
Genre: 
A
Position: 
1
Cantus ID: 
002713
Mode: 
4T
Finalis: 
B
Differentia: 
A2
Differentia database: 
1--h-h-h-g-j-h--4 55c
Extra: 
046r
Indexing notes: 
differentia is: b-b-b-a-c-b (i.e., the same shape as 4.A2 but avoiding the need for a flat for the semitone at the end);