The Intrigues of the conclave, set forth in a relation of what passed therein at the election of Sixtus V. & Clement VIII. [electronic resource] : with an historical account of the election of popes in former ages : also, a more particular description of the manner of it at this day : to which is added an essay to demonstrate that, according to the principles of the Church of Rome, there has been no true and lawful pope since the election of Sixtus V.