Correspondence; records of canon law cases; manuscripts of his canon law books Legal Formulary (1898) and The Roman Court (1895); papers related to his study of Catholic orphanages, Orphans and Orphan Asylums (1885); pamphlets on Catholic problems; and photographs. Correspondents include Arthur Preuss, William H. Sadlier, Bishop Henry J. Richter, and Francesco Cardinal Satolli.