In 1838 he took a leading part in the Church education movement, by which diocesan boards were established throughout the country; and he wrote an open letter to his bishop in criticism of the recent appointment of the ecclesiastical commission.
On the 3rd of January 1565 he declared in an open letter addressed to the metropolitan his intention to abdicate.
When, however, in connexion with the quarrel about the archbishopric of Cologne (1837), political Catholicism raised its head menacingly, Leo turned against it with extreme violence in his open letter (1838) to Goerres, its foremost champion.
Accused of violating treaties, breaking oaths, persecuting the church and abetting heresy, Frederick replied by an open letter rebutting these charges, and in equally unmeasured terms denounced the arrogance and want of faith of the clergy from the pope downwards.
The place to be visited was not specified; but the pilgrim, who was bound by an open letter of his bishop to disclose himself as a pentitent, lay under the obligation, wherever he went, to repair to the churches and - more especially - the tombs of the saints, and there offer his prayers.
On this occasion, however, though strongly drawn to the beautiful island, he stayed not longer than six weeks, and proceeded to Sydney, where, early in 1890, he published, in a blaze of righteous anger, his Father Damien: an Open Letter to the Rev. Dr Hyde of Honolulu, in vindication of the memory of Father Damien and his work among the lepers of the Pacific. At Sydney he was very ill again: it was now obvious that his only chance of health lay within the tropics.
Some ill-considered imputations upon Father Damien by a Presbyterian minister produced a memorable tract by Robert Louis Stevenson (An Open Letter to the Rev. Dr Hyde, 1890).
PASTORAL LETTER, an open letter addressed by a bishop to the clergy or laity of his diocese, or to both, containing either general admonition, instruction or consolation, or directions for behaviour in particular circumstances.
Having made careful investigations, Gladstone, on the 7th of April 1851, addressed an open letter to Lord Aberdeen, bringing an elaborate, detailed and horrible indictment against the rulers of Naples, especially as regards the arrangements of their prisons and the treatment of persons confined in them for political offences.
In March 1897 he recapitulated the hideous history in an open letter to the duke of Westminster.