Apostolic Letter Con singular complacencia to the Bishops of the Philippines on Catholic Action (January 18, 1939) [Spanish] Apostolic Letter Annus Fere to all the Bishops ordering a general collection in favor of the starving Russian people (July 10, 1922) [Italian] Apostolic Letter I disordini to the Italian Bishops for the re-establishment of religious peace (August 6, 1922) [Italian] Apostolic Letter Ora sono pochi on the Day of the "March on Rome" (October 28, 1922) [Italian] Apostolic Letter Meditantibus Nobis on the third centenary of the Canonization of St Ignatius of Loyola and Francis Xavier (December 3, 1922) [Italian] Apostolic Letter Unigenitus Dei on the criteria for the formation of clergy (March 19, 1924) [Italian] Apostolic Letter Paterna Sane to Bishops, clergy and people of Mexico on the conditions of Mexico (February 2, 1926) [Italian] Apostolic Letter Singulare Illud on Saint Aloysius Gonzaga, Patron of Catholic Youth (June 13, 1926) [Italian]