Great Britain. Geological Survey of England and Wales. Great Britain. Geological Survey of England and Wales. Sheet 284 drift. Great Britain. Ordnance Survey of England. North Decimal Degree 51.350000. South Decimal Degree 51.1667. East Decimal Degree -0.8333. 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. "Original geological survey on the one-inch scale by W. T. Aveline et al. Published on sheet 8 and 12 Old Series 1860-68. Resurveyed on the six-inch scale by F. J. Bennet (N.W. Corner), J. H. Blake (Tertiary area), and C. E. Hawkings (Cretaceous area). Published, with drift, December 1897.".