Geological Survey of Great Britain. Great Britain. Geological Survey of England and Wales. Sheet 139 drift. Great Britain. Ordnance Survey of England. North Decimal Degree 52.916700. South Decimal Degree 52.7500. East Decimal Degree -2.0667. West Decimal Degree -2.4833. 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) published and revised on Old Series maps 73 S.E., 72 S.W. 62 N.W. and 61 N.E., in 1852-59. Re-surveyed (on the six-inch scale) in 1898-1900 by W. Gibson, et al.".