Fifty reasons, [electronic resource] : or motives, why the Roman Catholic, apostolic religion ought to be preferred to all the sects this day in Christendom; and which induced his most serene highness Anthony Ulrick, Duke of Brunswick and Lunenburg, to abjure Lutheranism. To which are added, three valuable papers: I. The Decision of the Protestant University of Helmstadt, in Favour of the Roman Catholic Religion. II. Copies of Two Papers written by the late Charles II. King of Great Britain. III. And of a Paper written by the late Duchess of York, Spouse of James, afterwards the Second King of that Name.