John Dennis, the son of a saddler in London, born 1657, was a mediocre writer, and rather better critic of the time, with whom Pope came a good deal into collision. Addison's tragedy of Cato,for which Pope had written a prologue, had been attacked by Dennis. Pope, to defend Addison, wrote an imaginary report, pretending to be written by a notorious quack mad-doctor of the day, entitled The Narrative of Dr. Robert Norris on the Frenz of F. D. Dennis replied to it by his Character of Mr. Pope. Ultimately Pope gave him a place in his Dunciad, and wrote a prologue for his benefit