Geological Survey of Great Britain. Great Britain. Geological Survey of England and Wales. Sheet 246 drift. Great Britain. Ordnance Survey of England. North Decimal Degree 51.700000. South Decimal Degree 51.5333. East Decimal Degree -4.1667. West Decimal Degree -4.5667. In upper left margin: Ordnance Survey of Great Britain. Relief shown by contour interval and spot heights. Transverse Mercator projection. National grid system. Depth shown by contour intervals "Original geolgocial survey on the one-inch scale by Sir. H. T. de la Beche et al. Published on Sheet 37, Old Series before 1845. Resurveyed on the six-inch scale by A. Strahan et al. Published with Drift, 1906.".