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. [The Text of the Encyclical "Ubi Primum" of 3 May 1824. Published by the Roman Catholic Hierarchy of Ireland, Together with Their Joint Pastoral Instructions, on the Subject.]