WILLIAM SMITH I HIS MAPS AND MEMOIRS 
147 
" In 1790 an experiment for Coal in these Strata near the Shoe 
Alehouse at Plat/ord on the borders of the New Forest." 
This Section bears the imprint : " London : Published by John 
€ary, No. 181, Strand, May 1st, 1819." (Reproduced on Plate XV., 
fig. 1). 
The next Chart (No. 5), 36J inches by lOf inches, contains two 
sections, viz., " Geological View and Sections in Essex and 
Hertfordshire," and " Geological View and Section of the 
OOUNTRY between LoNDON AND CAMBRIDGE." (Plate XV., fig. 2). 
The former begins at Wimpole on the North-West, and cuts 
through Royston, Bishop Stortford and Chelmsford to Shoebury on 
the South-East. Near Royston are " Chalk Hills " ; near Chelms- 
ford, " Plains and Insular Hills " The Rodings ") and, near 
Shoebury, " Hundreds." 
There are eight sets of descriptions, viz., (beginning at the left) : — 
" Golt Bricheatth occurs uniformly {and also beneath the 
alluvium) in this and other Valleys around Catnbridge.'' 
** Part only of the thickness of the Chalk is ascertained by the 
deep wells at Royston.'' 
" Alluvial Gravel and Blue Clay with rounded fragments of 
Chalk frequently cover these heights and emarginate the plastic Clay 
Brickearth and Sand which regularly surmount the Chalk Stratum." 
" In the Valley of the River Stort a Branch of the Lea, Chalk is 
unveiled North of Hockerill, which reappears over the Summit on, 
the Newmarket Road against Quendon." 
" The Rodings of Essex , Clay is connected thence North- 
eastward with the Clay Summit of Suffolk and Norfolk." 
Alluvial Gravel in the Valley of the Chelmer River." 
Hills of Clay, surmounting .in the Series of Strata, the more 
regularly sloping Plains of Clay, Sand, etc." 
Hundreds of Essex, chiefly low and Marshy, but Clay on the 
rising ground." 
Very deep Wells sunk in these Clays show their correspondence 
with the opposite Coast of Kent." 
