PREFACE: The first five lectures printed in this volume were delivered in the Church of All Hallows-on-the-wall, in the city of London, to an audience consisting of clergymen, working for the most part in the parishes of London and its suburbs. They were delivered at the request of an association of East End incumbents, which is known by the name of "Our Society," on five consecutive Thursday mornings in Lent, 1892. These five lectures deal with the claim to a supremacy or primacy of jurisdiction, as of divine right, which is made on behalf of the Roman pontiffs. The two remaining lectures have been written subsequently, and deal with the theory that communion with the see of Rome is the necessary condition of communion with the Catholic Church......Many of the earliest books, particularly those dating back to the 1900's and before, are now extremely scarce and increasingly expensive. We are republishing these classic works in affordable, high quality, modern editions, using the origin