SHEPPARD : MARTIX SIMPSON AND HIS GEOLOGICAL MEMOIPvS 307 
identical. Before the title are General Section of the East Yorkshiie 
Strata " (with thicknesses) and [six] " Sections of Strata on the York- 
shire Coast," between Filey and Whitby. 
In 1859 was issued the Third edition,"— in reality the Second — 
with similar title to the preceding, in a red cover, with slightly wider 
pages, and with " Price Sixpence " added. It is enlarged to 32 pages 
there are additional notes on Drift, Ironstone and Alum ; and the 
price of " The Fossils of the Yorkshire Lias : recently pubUshed," is 
now given as Is. 6d. There are two plates of sections as in the pre- 
ceding. 
In 1868 was published the " Fourth edition — in reaHty the Third 
(64 pp.), in stiff buff covers ; the wording of the title is similar to that 
of the previous editions, except for the words " Fourth Edition " and 
the date " 1868," but on the cover the Imprint is given as ■'' London 
/ Whittaker & Co., / Ave Maria Lane / Whitby : Silvester Reed /1868 / 
Price Is. 6d. 
Two plates of sections are now added, making four in all. 
A further " fourth edition " (64 pp.) was also issued, the title and 
contents of which are similar to the preceding, but the cover is different, 
as the words " Lecturer on Natural Science and Curator of Museums " 
occupy one line instead of two, and the imprint now reads : — 
London : Whittaker & Co., Ave Maria Lane. Whitby : S. Reed, 
2 John's Street, West Cliff." 
and occupies four lines instead of three : there is no date and no price 
marked, and the back cover contains an advertisement of S. Reed's 
Public Library, whereas the previous one is blank. Possibly part of 
the impression was kept in sheets, and the cover added as the earlier 
impressions were sold. 
There was evidently a difference in the dates of the publication of 
these two " fourth " editions, as the first contains an oval label in 
black, on the inside cover, which reads : — Wm. Dalton, Successor to 
J. Shuttleburgh Fossil and Shell Dealer, 38, Cliff Street, Whitby. 
Ammonite and Pentacrinite Brooches, Pins and Studs. Fossils, Shells, 
and Corals in great variety, Shells " ; whereas the second named issue 
contains an oblong red stamp, from which it appears that Dalton is now 
