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Illustration of Saint Grégoire holding the bloody corporal, with printed text citing the encyclical Maximum Illud by Benedict XV of 30 November 1919. Reverse: printed text 'Apostolat de la Prière des Enfants' and a long handwritten letter to Madame Léonie Verzicourt in Beaumont-sur-Oise, with a 20-centime green stamp and cancellation 'ANNECY' dated 20 May 1920.