John Hill's Penny Post

*John Hill's Penny Post, in* 1659.—I noted a few years back, from a bookseller's catalogue, the title of a work— "Hill (John), a Penny-Post; or a vindication of the liberty of every Englishman in carrying Merchants' and other Men's letters against any restraints of farmers of such employments. 4to. 1659." Can any of your correspondents give an account of this work?