MADRID. Artist/engraver/cartographer: Cartography by WB Clarke; engraved by J Henshall. Provenance: "Maps of the Society for the Diffusion of Useful Knowledge. A new edition, corrected to the present time", published by Charles Knight & Co, 22 Ludgate Street, London [SDUK Atlas]. Type: Antique steel engraved map with original outline hand colouring. Inset: Diagrammatic comparison showing profiles and height of key buildings and structures.