Geological Survey of Great Britain. Great Britain. Geological Survey of England and Wales. Sheet 316 drift. Great Britain. Ordnance Survey of England. North Decimal Degree 51.0000. South Decimal Degree 50.8167. East Decimal Degree -0.8500. West Decimal Degree -1.2667. 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, F.R.S Published on Sheets 9 and 11, Old Series, 1864 and 1856. Resurveyed on the six-inch scale, by W. Whitaker, F.R.S., et al. Published with Drift 1900. Some revisions and additions by F. H. Edmunds in 1928.".