 He made use of the positive method in his study of early Christianity in his book "Il cristianesimo primitivo e la Politica imperiale romana" ("Primitive Christianity and Roman Imperial Politics", 1911).From 1906 to 1908 he was the archivist of the Sacred Congregation of Apostolic Visitation.He founded the magazine "Rivista storico-critica delle scienze teologiche" ("Historical-critical Review of the Theological Sciences"), and was its director from 1905 to 1910.