Encyclicals and other letters of Pius XII Vol.3 Darkness over the earth - Summi Pontificatus 1939|Christian worship - Mediator Dei 1947|The priestly life - Menti Nostrae 1950|The lay apostolate - 1957|World peace and Church freedom - Meminisse Juvat 1958|The mystical body of Jesus Christ - Mystici Corp - Pius XII (London Catholic Truth Society, various dates .)