A photograph of Dom André Mocquereau (d. 1930), taken the year before his death:
A photograph of Dom Joseph Pothier, who taught Dom Mocquereau:
Pope Saint Paul VI (3 April 1969): “Although the text of the Roman Gradual—at least that which concerns the singing—has not been changed, the Entrance antiphons and Communions antiphons have been revised for Masses without singing.”