MURCHISON, Roderick Impey. The Silurian System, founded on Geological Researches in the Counties of Salop, Hereford, Radnor, Montgomery, Caermarthen, Brecon, Pembroke, Monmouth, Gloucester, Worcester and Stafford. London: John Murray, 1839. 2 vols. [including 'Atlas' volume], 4to (311 x 240mm.) 6pp. list of subscribers, 56 plates, including 31 lithographed plates of fossils, 10 hand-coloured lithographic folding sections, 2 engraved maps, 13 lithographed plates including 2 hand-coloured, and 1 folding. (Heavy damp-stain to first four plates and to the fossil plates, browning to folding plates, toning, lacks large separate geological map.) Contemporary red half straight grain morocco over marbled paper-covered boards (rubbing, some loss to marbled paper). Provenance: Jos Newill (name inscribed to front pastedown, gift inscribed to on title); by descent, from the estate of Rendel Williams (2).