Map of the Geology and Contours of London and its Environs. R. W. Mylne's 1856 map reproduced in 1993.Map of the Geology and Contours of London and its Environs, reproduction in 1993 of Mylnes 1856 map. A fine reproduction was published in 1993, now out of print, by the London Topographic Society. In four quarter sheets each 43. 5 x 59cm (17. 25 x 23. 25 in) Scale at 1: 23,760 (1 inch = 0 . 375 mile). With a historical geological essay by Eric Robinson and topographic essay by Simon Morris. In yellow folder. In fine, as new, condition.