James A. Knipe, geologist, first published a 2-sheet geological map of the British Isles in 1840. This was an influential map with full colour by geological section. Beneath the title is a list of the “Authorities Consulted for the Construction of this Map” which includes William Smith, Lyell, de La Beche, Mantell, Greenough and Conybeare. Upper right may be found three geological sections and two across the country at the lower margin. There is an extensive Geological Reference here and Explanation. This is an example of the fourth edition published in 1857. Provenance: William Duck 1995; private English collection.