wales
‘Curvature of the limestone at Chepstow’
Geological Map of the Rhobell Fawr District (Wells, 1925)
Map of the Silurian Region (Murchison, 1838)
A New Map of South Wales (Greenough and Coltman, between 1813-1839)
Standard Quarry, Welshpool
Adam Sedgwick (1785-1873)