The Encyclical Letter of Pope Leo The XII to his Venerable Brethren, the patriarchs, primates, archbishops and bishops of the Catholic Church, with an English translation of the same. To which are annexed pastoral instructions by the R.C. archbishops and bishops, to the clergy and laity of their communion throughout Ireland., 1824, Volume: 106. Lord Eldon Manuscript Collection, MSS-056. Manuscripts. https://aspace.ll.georgetown.edu/public/repositories/3/archival_objects/30871 Accessed May 09, 2024.