An essay upon something: or something of an essay [electronic resource] : Being a full and compleat answer to all that has been, or can be published by the infamous, knitty, lousy, shabby, scabby, paultry, insignificant, venemous, billingsgate, pickpocket son-of-a-whore Caleb D'Anvers Esq; By Timothy Scrub, of Rag-Fair, Esq