Geological Survey of Great Britain. Great Britain. Geological Survey of England and Wales. Sheet 319 drift. Great Britain. Ordnance Survey of England. North Decimal Degree 50.9667. South Decimal Degree 50.800. East Decimal Degree 0.3833. West Decimal Degree -0.0167. 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, published on Sheet 5, Old Series, in 1864. New Edition in 1893. Chalk areas re-surved on the six-inch scale by W. A. E. Ussher & C. Reid in 1884 & 1890, and River Deposits by F. H. Edmunds, 1925.".