Popery unmask'd. [electronic resource] : Being the substance of Dr. Middleton's celebrated Letter from Rome: demonstrating an exact conformity between popery and paganism. With an abstract of the Doctor's reply to the Objections of the writer of a popish book, intituled, The Catholic Christian instructed, &c. Design'd as a brief, but seasonable Antidote to the spreading Infection of Popery: And to shew, What an absurd Religion the Emissaries of Rome are so zealously endeavouring to propagate in these Protestant Nations.