130 WILLIAM SMITH : HIS MAPS AND MEMOIRS 
soil, and more or less productive in coal, rises gradually to the tops of 
the highest hills. Eminences on its eastern side, with those of the 
wolds and Hambleton hills, seem to form the extreme limits of an 
immense vale, the central part of which is the vale of York. The coal- 
measures form the largest portion of any of the Yorkshire strata. Its 
northern and western parts in Craven and Richmond are beautifully 
interspersed with a rich surface on a substratum of limestone. These 
are the two principal districts of this kind of land which so much 
relieve the general dreariness of surface, occasioned by the bleak high 
and wet moors of the coal measures ; but which vast surface is also 
further broken and relieved by various interspersions of the dry and 
rich soil of limestone, in Swaledale, Yoredale and others." 
This volume was printed by " S. Goswell, Printer, Little Queen 
Street, London." 
STRATA IDENTIFIED BY ORGANISED FOSSILS. 1816. 
In the following year was published a large 4to volume, entitled : — 
"Strata / identified by / Organized Fossils, / containing / 
Prints on Coloured Paper / or the most / Characteristic 
specimens / IN each / Stratum. / By William Smith, / Mineral 
Surveyor, / Author of " Map of the Strata of England and 
Wales," and " A Treatise on Irrigation." / London : / Printed 
BY W. Arding, 21, Old Boswell Court, Carey Street; / 
AND SOLD BY THE AUTHOR, 15, BUCKINGHAM StREET, StRAND ; J. 
SowERBY, 2, Mead Place, / Lambeth ; Sherwood, Neely, and 
Jones, and Longman, Hurst, / Rees, Orme, and Brown, Pater- 
noster Row ; / AND BY ALL BOOKSELLERS. / JuNE 1, 1816." 
Phillips states* that " the first part " of this work was issued in 
1817, but as two parts were issued in 1816, it is apparent Phillips had 
made a slip. Of this publication Phillips tells us : — 
" In this year (1817) also was issued the first number of another 
work, entitled Strata Identified by Organized Fossils," consisting of 
numerous figures of fossils engraved by Sowerby and printed on paper 
to correspond in some degree with the natural hue of the strata. 
This remarkable work reached its fourth number (only seven were 
proposed). The publication of it was undertaken by Mr. Sowerby, 
* loc. cit., p. 79. 
