Great Britain. Ordnance Survey of England. Great Britain. Geological Survey of England and Wales. Sheet 218 solid and drift. Geological Survey of Great Britain. North Decimal Degree 52.050000. South Decimal Degree 51.8667. East Decimal Degree -1.2333. West Decimal Degree -1.6500. In upper left margin: Ordnance Survey of Great Britian. Relief shown by contour interval and spot heights. Transverse Mercator projection. National grid system. "Original geological survey on the one-inch scale by H. Baverman et al. Published on Old Series sheet 45 in 1859-63. Partial revision by J. W. Judd, published 1871. Survey on the six-inch scale in 1955-61 by B. J. Williams et al.".