However, although I may well have confused editions of that 'Directorium chori', it looks to me like the same nuanced chant written in a modified mensural notation, already posted by MatthewRoth.Salve Regina III
Cantus Oratorii, Parisiis, 1610-1615; prima vice editus a. 1634 in
« Directorium chori» (Oratorii Paris.). Auctor est probabiliter P. Bourget,
Sacerdos Oratorii
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