A letter from Rome, shewing an exact conformity between popery and paganism : Or, The religion of the present Romans, derived from that of their heathen ancestors. The fourth edition. To which are added, I. A prefatory discourse, containing an answer to all the objections of the writer of a popish book, intituled, The Catholic Christian instructed, &c. with many new facts and testimonies, in farther confirmation of the general new argument of the letter. and II. A postscript, in which Mr. Warburton's opinion concerning the paganism of Rome is particularly considered. By Conyers Middleton, D.D. principal librarian of the University of Cambridge.