An appel to the public, in vidication of the conduct of John Hanson in regard to the prices charged by Mr. John Mackell, Smith, and allowed by James Wyatt, Esq. architect, for the iron railing made by Mr. Mackell for enclosing the gardens in The Green Park : With a prefatory address to the Marquis of Salisbury and the Right Honourable Lord Romney. To which are added, exgravings of several illustrate drawings. The whole intended to correct certain misrepresentations on that subject.