Si in digito dei ejicio

Source: 
Worcester, Cathedral - Music Library, F.160 (olim 1247) (with hymnal)
Folio: 
049v
Sequence: 
7
Feast: 
Dom. 3 Quadragesimae
Office/Mass: 
P
Genre: 
A
Cantus ID: 
004898
Mode: 
3
Differentia: 
1a
Differentia database: 
1--k-k-kj-hj-hG-g--4 101i
Addendum: 
P: 099