Geological Survey of Great Britain. Great Britain. Geological Survey of England and Wales. Sheet 268 drift. Great Britain. Ordnance Survey of England. North Decimal Degree 51.516700. South Decimal Degree 51.3500. East Decimal Degree -0.8333. West Decimal Degree -1.2500. In upper left margin: Ordnance Survey of Great Britain. Relief shown by contour interval and spot heights. Transverse Mercator projection. National grid system. "Original Geological Survey on the one-inch scale by H. W. Bristow et al. Published on Sheets 7, 8, 12, & 13 Old Series, 1860-62. Resurveyed on the six-inch scale by F. J. Bennet (S.W. part) J.H. Blake. Published with drift, Map 1898. Colour Printed 1904.".