Two letters from H. H. Pius VI. to the Bishop of Leon, and the prelates of Germany. To which are added a letter from Cardinal Antonelli Prefect of the Congregation of Propaganda Fide, by order of H. H. to the bishops, vicars apostolic, etc. of the Church of Rome, in His Majesty's dominions. With extracts of a letter from Cardinal Gerdill To Monseig. Erskine, Auditor Of H. H. and from Cardinal Antonelli to the Roman Catholic prelates of Ireland.