Robert A. Graham's research did not stop with the publication of the ADSS; he continued to seek out primary sources within and without the Vatican and interview contemporaries almost until his death.Phayer, 2008, p. xiv. He retired to California, taking his considerable body of records with him; this collection was made open to the public (although rarely actually used) until his death, at which point the Vatican had all the papers returned to Rome and sealed.
