https://www.vatican.va/content/benedict-xvi/en/letters/2006/documents/hf_ben-xvi_let_20060515_50-haurietis-aquas.html
Letter to the Superior General of the Society of Jesus on the 50th anniversary of the Encyclical...
Pope Pius XII's Encyclical, Haurietis Aquas, Feast of the Sacred Heart, Fr Peter-Hans Kolvenbach, Superior General of the Society of Jesus, Jesuits, St Claude...
the superior general