Relief shown pictorially. Publisher's address changed to Soho Square. Publisher's title now hydrographer to H.R.H. the Prince of Wales. Cartouche incorporates view and text describing the falls of Niagara. On verso: "Sold by C. Smith, Mapseller, No. 172, Strand. 850" Labels indicating sector on verso. 1 map on 4 sheets: hand col., dissected and mounted on linen; 122 x 142 cm.