Geological Survey of Great Britain. Great Britain. Geological Survey of England and Wales. Sheet 261 and 262 drift. Great Britain. Ordnance Survey of England. North Decimal Degree 51.533300. South Decimal Degree 51.3667. East Decimal Degree -3.3333. West Decimal Degree -3.7333. 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 Geological Survey on the one-inch scale by Sir H. De la Beche and others. Published on Sheets 20, 36 & 37, Old Series. Revised up to 1872 by H. W. Bristow and H. B. Woodward. Resurveyed on the six inch scale by R. H. Tiddeman et al. Published with Drift 1901.".