Great Britain. Ordnance Survey of England. Great Britain. Geological Survey of England and Wales. Sheet 254 drift. Geological Survey of Great Britain. North Decimal Degree 51.683300. South Decimal Degree 51.5167. East Decimal Degree -0.8167. West Decimal Degree -1.2333. In upper left margin: Ordnance Survey of England (Third edition). Relief shown by contour interval and spot heights. Transverse Mercator projection. National grid system. "Original Geological Survey on the one-inch scale by E. Hull et al. Published on Sheets 7 and 13 Old Series 1859-1871. Resurveyed on the six-inch scale by J. H. Blake et al. Published with Drift, 1905. Amendments to Chalk boundaries by S. C. A. Holmes in 1945.".