The Letter to Dion, Mandeville's last publication, was, in form, a reply to Bishop Berkeley's Alciphron: or, the Minute Philosopher. In Alciphron, a series of dialogues directed against "free thinkers" in general, Dion is the presiding host and Alciphron and Lysicles are the expositors of objectionable doctrines.
Mandeville's Fable of the Bees is attacked in the Second Dialogue, where Lysicles expounds some Mandevillian views but is theologically an atheist, politically a revolutionary, and socially a leveller. In the Letter to Dion, however, Mandeville assumes that Berkeley is charging him with all of these views, and accuses Berkeley of unfairness and misrepresentation.