Rhythmique

In the same year, a series of articles on the subject of the rhythmic quantities of Gregorian musical signs began to be published, entitled 'La Question Rhythmique Grégorienne' by the Abbé G Delorme.

Mocquereau published Le nombre musical grégorienne ou rhythmique grégorienne (two volumes) in 1908 & 1927, in which he presented his own understanding of Gregorian rhythm, several elements of which have since been generally discredited.