See this legally free ebook:

  • The Roman Primacy, A.D. 430-451, by Rev. Luke Rivington (London, New York, Bombay: Longmans, Green, and Co., 1899). With Imprimatur. May be read online, and available in various formats (pdf, epub, mobi/kindle,  djvu, text, etc.) at Internet Archive and Open Library, with a second copy at Internet Archive and Open Library.
    • See also the same author’s The Primitive Church and the See of Peter, with an Introduction by the Cardinal Archbishop of Westminster (through our 30 June 2013 post)

On the Memorial of Pope St. Leo the Great in the Ordinary Form of the Roman Rite. For other legally free ebooks, you may access the List of Free eBooks (Arranged by Title) and the List of Free eBooks (Grouped by Subject).

O God, our refuge and our strength, look down with mercy upon the people who cry to Thee; and by the intercession of the glorious and immaculate Virgin Mary, Mother of God, of Saint Joseph her spouse, of the blessed Apostles Peter and Paul, and of all the saints, in Thy mercy and goodness hear our prayers for the conversion of sinners, and for the liberty and exaltation of the Holy Mother the Church. Through the same Christ Our Lord. Amen. (From Sancta Missa)