Geological Survey of Great Britain. Great Britain. Geological Survey of England and Wales. Sheet 274 solid and drift. Great Britain. Ordnance Survey of England. North Decimal Degree 51.450000. South Decimal Degree 51.2833. East Decimal Degree 1.6667. 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. Depth shown by contour intervals. "Original geological survey on the one-inch scale by W. Whitaker published on Old Series Sheet 3 in 1868 (New edition showing post-Teritary deposits in 1875, revised in 1889); additions by F. H. Edmunds, transferred to New Series Sheet 274 by P. E. Harding, et al. in 1938 and 1961-2.".