It is supposed, that by the act of writing in verse an Author makes a formal engagement that he will gratify certain known habits of association, that he not only thus apprizes the Reader that certain classes of ideas and expressions will be found in his book, but that others will be carefully excluded. This exponent or symbol held forth by metrical language must in different aeras of literature have excited very different expectations: for example, in the age of Catullus Terence and Lucretius, and that of Statius or Claudian, and in our own country, in the age of Shakespeare and Beaumont and Fletcher, and that of Donne and Cowley, or Dryden, or Pope. I will not take upon me to determine the exact import of the promise which by the act of writing in verse an Author in the present day makes to his Reader; but I am certain it will appear to many persons that I have not fulfilled the terms of an engagement thus voluntarily contracted. I hope therefore the Reader will not censure me, if I attempt to state what I have proposed to myself to perform, and also, (as far as the limits of a preface will permit) to explain some of the chief reasons which have determined me in the choice of my purpose: that at least he may be spared any unpleasant feeling of disappointment, and that I myself may be protected from the most dishonorable accusation which can be brought against an Author, namely, that of an indolence which prevents him from endeavouring to ascertain what is his duty, or, when his duty is ascertained prevents him from performing it.