Aguiar, B. M., , , March 1973, pp 68–81. Archives of the Jesuits in Britain, http://www.jesuit.org.uk/archives-jesuits-britain . A summary of the papers held on Roberts can be seen here: https://archive.catholic-heritage.net/TreeBrowse.aspx?src=CalmView.Catalog&field=RefNo&key=ABSI%2fSJ%2f13. . Balaguer, M.M.; Fernander, Angelo; Gracias, Valerian; , , 15 September 1962. Dane, Clement, , , 15 December 1950. (Issue 16 of the series "Men who make the council") , Vol 7 1971-1980, Black, 1981, .