Great Britain. Geological Survey of England and Wales. Great Britain. Ordnance Survey of England. Sheet 339 drift. North Decimal Degree 50.6667. South Decimal Degree 50.5000. East Decimal Degree -3.3167. West Decimal Degree -3.7167. In upper left hand corner: Ordnance Survey of England (Third Edition). Relief shown by contour interval and spot heights.Transverse Mercator projection. National grid system. Depth is shown by contour interval. "Resurveyed chiefly on the Old Series one-inch map by H. B. Woodward, W. A.E. Ussher and C. Reid. Transferred to the New Series map and published Dec. 1899. Some revisions on the six-inch scale by W. A. E. Ussher in 1909.".