Geological Survey of Great Britain. Great Britain. Geological Survey of England and Wales. Sheet 273 solid and drift. Great Britain. Ordnance Survey of England. North Decimal Degree 51.4667. South Decimal Degree 51.3000. East Decimal Degree 1.2500. West Decimal Degree 0.8333. 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 et al., published on Old Series Sheet 3, 1868. Revisions by C. E. Hakwins, published in 1872 and 1875. Resurveyed on the six-inch scale, a small tract east of Faversham by J. R. Earp, the remainder by S. Buchan et al. 1937-1946." In lower right margin: "Based on the sixth edition new popular one-inch map, parts of sheets 172 & 173, dated 1946.".