Geological Survey of Great Britain. Great Britain. Geological Survey of England and Wales. Sheet 263 drift. Great Britain. Ordnance Survey of England. North Decimal Degree 51.533300. South Decimal Degree 51.3667. East Decimal Degree -2.9167. West Decimal Degree -3.3167. In upper left margin: Ordnance Survey of England. Relief shown by contour interval and spot heights. Transverse Mercator projection. National grid system. Depth shown by contour intervals. "Original Geological Survey on the one-inch scale by Sir H. De la Beche, Director General, W. T. Aveline and others. Published on Sheets 20 and 36 Old Series. Revisions up to 1878 by H. W. Bristow et al. Resurveyed on the six-inch scale by A. Strahan et al. Published with Drift July 1897. Revised 1902.".