WILLIAM SMITH : HIS MAPS AND MEMOIRS 
149 
The next Chart (No. 6) is a " Vertical Section of Strata in 
Surry dipping Northward. Section of Strata in Sussex dip- 
ping Southward." It measures 36| inches by lOf inches. It begins 
near London on the north and cuts through Croydon, Godstone, East 
Grinstead, Lewes, Brighton and on to Cuckmere Harbour. The main 
headings are — commencing at London, " Plains and Insular Hills " ; 
Surry Chalk Hills " (" This ridge extends through Kent to the Sea 
at Dover and Westward by the Hogsback to Hampshire) ; " Clay Vale " 
(" Weald of Kent and Surrey ") ; " Forest Ridge extends to Sea at 
Hastings Ashdown Forest " ; " Clay Vale " (" Weald of Sussex ") ; 
" Sussex Chalk Hills " {" or South Downs, Terminating in Beachy 
Head:'). 
In this case there are ten sets of descriptive paragraphs. They 
are, beginning at the left (north) : — 
" The little Water found in these Hills generally of a bad 
quality — In deep Wells sunk through the Clay Water rises from the 
Chalk.' 
" Shooters Hill higher than Norwood and other Clay Hills 
South of London shows at its base the Chalk at Greenwich, Sand 
and Loam at Woolwich — Higher in the Clay lie Organized Fossils 
similar to those in the CIoaj on Newhaven Castle Hill — In deep 
Wells at Brixton Causivay and Streatham the same species arefbmid. 
On the Plain of Blackheath ivhich is Sand and Gravel & the base 
of the more elevated Clay in the Hill, Wells are sunk into the Chalk, 
which shoivs the absurdity of the common opinion that Blackheath 
contains Coal." 
" Fossil Oyster Shells at Addington Hills and Sudbury. 
"Fossil Echini occur in these Hills as in other similar parts of 
the Chalk." 
The Golt Brickearth is identified by a small transparent 
belemnite." 
On Copthorn Common near Newchapel is the Summit Level 
of the -proposed Weald of Kent and Mesterham and Portsmouth 
Canals 166 feet above the Tunbridge Navigation." 
" Crowborough the central and highest part — A few Miles 
West along the Forest Ridge is the fine Turners Hill Stone a better 
part of these soft Sandstones." 
