To satisfy the curiosity of those, who will give themselves the trouble of reading the ensuing poem, I think myself obliged to render them a reason why I publish an opera which was never acted. In the first place, I shall not be ashamed to own, that my chiefest motive was, the ambition which I acknowledged in the Epistle. I was desirous to lay at the feet of so beautiful and excellent a princess, a work, which, I confess, was unworthy her, but which, I hope, she will have the goodness to forgive. I was also induced to it in my own defence; many hundred copies of it being dispersed abroad without my knowledge, or consent: so that every one gathering new faults, it became at length a libel against me; and I saw, with some disdain, more nonsense than either I, or as bad a poet, could have crammed into it, at a month's warning; in which time it was wholly written, and not since revised. After this, I cannot, without injury to the deceased author of "Paradise Lost," but acknowledge, that this poem has received its entire foundation, part of the design, and many of the ornaments, from him. What I have borrowed will be so easily discerned from my mean productions, that I shall not need to point the reader to the places: And truly I should be sorry, for my own sake, that any one should take the pains to compare them together; the original being undoubtedly one of the greatest, most noble, and most sublime poems, which either this age or nation has produced. And though I could not refuse the partiality of my friend, who is pleased to commend me in his verses, I hope they will rather be esteemed the effect of his love to me, than of his deliberate and sober judgment. His genius is able to make beautiful what he pleases: Yet, as he has been too favourable to me, I doubt not but he will hear of his kindness from many of our contemporaries for we are fallen into an age of illiterate, censorious, and detracting people, who, thus qualified, set up for critics. In the first place, I must take leave to tell them, that they wholly mistake the nature of criticism, who think its business is principally to find fault. Criticism, as it was first instituted by Aristotle, was meant a standard of judging well; the chiefest part of which is, to observe those excellencies which should delight a reasonable reader. If the design, the conduct, the thoughts, and the expressions of a poem, be generally such as proceed from a true genius of poetry, the critic ought to pass his judgement in favour of the author. It is malicious and unmanly to snarl at the little lapses of a pen, from which Virgil himself stands not exempted. Horace acknowledges, that honest Homer nods sometimes: He is not equally awake in every line; but he leaves it also as a standing measure for our judgments, --Non, _ubi plura nitent in carmine, paucis_ Offendi _maculis, quas aut incuria fudit, Aut humana parum cavit natura._--