"If ever I write any more Epistles in verse, one of them shall be addressed to you. I have long concerted it, and begun it; but I would make what bears your name as finished as my last work ought to be, that is to say, more finished than any of the rest. The subject is large, and will divide into four Epistles, which naturally follow the 'Essay on Man;' viz. 1. Of the Extent and Limits of Human Reason and Science. 2. A View of the useful and therefore attainable, and of the unuseful and therefore unattainable, Arts. 3. Of the Nature, Ends, Application, and Use of different Capacities. 4. Of the Use of Learning, of the Science, of the World, and of Wit. It will conclude with a Satire against the Misapplication of all these, exemplified by Pictures, Characters, and Examples."
This work in its full extent, being now afflicted with an asthma, and finding the powers of life gradually declining, he had no longer courage to undertake; but, from the materials which he had provided, he added, at Warburton's request, another book to the "Dunciad," of which the design is to ridicule such
