David Schindler is Dean Emeritus and Gagnon Professor of Fundamental Theology at the Pontifical John Paul II Institute for Studies on Marriage and Family at Catholic University of America in Washington, DC. This obituary is based on the eulogy delivered by Schindler at Caldecott’s funeral Mass held at St. Aloysius Church in Oxford, England, on 31 July 2014. It appears here with the author’s kind permission.