"Peter's name, proclaims him possess or all Church power, under Christ. Peter's name proclaim him the source of all Church power, under Christ." This is a simple summary of this book, first published in 1909 and of more value today than when it was originally written. Fr. Smith-Vaudry masterfully pulls from Sacred Scripture and Tradition, the Fathers of the Church and others to defend the Papacy and vindicate the claims of the Vicar of Jesus Christ. St. Alphonsus writes: "a single bad book will be sufficient to cause the destruction of a monastery." Pope Pius XII wrote in 1947 at the beatification of Blessed Maria Goretti: "There rises to Our lips the cry of the Saviour: 'Woe to the world because of scandals!' (Matthew 18:7). Woe to those who consciously and deliberately spread corruption-in novels, newspapers, magazines, theaters, films, in a world of immodesty!" We at St. Pius X Press are calling for a crusade of good books. We want to restore 1,000 old Catholic books to the market. We ask for your assistance and prayers. This book is a photographic reprint of the original The original has been inspected and many imperfections in the existing copy have been corrected. At Saint Pius X Press our goal is to remain faithful to the original in both photographic reproductions and in textual reproductions that are reprinted. Photographic reproductions are given a page by page inspection, whereas textual reproductions are proofread to correct any errors in reproduction.