11 
but this outcrop is continued by Gleadless, North of Heeley, 
to St. John's Church, in Sheffield ; and the extension of this 
coal so much to the West produces a ficticious appearance, 
as if it had suffered lateral traction, to the amount of four 
miles, to Mosbro', near Eckington. The same appearances 
are exhibited in the Gannister or Pecten coal, from Beau- 
chief Abbey to Bench Green. 
In like manner, on the North side of the Don, the Thick 
coal is worked at Rawmarsh, and much at the same depth 
at Attercliffe, and appears here to have been drawn back 
four miles. Again, the Sheffield coal at Dropping-Well 
near Kimberworth, is worked much at the same depth as 
in Sheffield Park, and exhibits an appearance as if it had 
suffered lateral traction to the amount of six miles. But 
both the appearance of a lateral movement of the beds on 
the Derbyshire side, just mentioned, and also that on the 
North side of the Don, is merely owing to the depression 
or synclinal axis above described ; and, as an effect of this 
depression, an extension of the disturbed beds to the 
West, beyond their general range, phenomena whiqh are ex- 
hibited in every East and West fault, where the downcast 
beds are always prolonged in their outcrops to the West. 
There is, however, this to be observed, that the beds of the 
Northern axis of the synclinal of the Don are elevated 
more abruptly, and to a higher level, than those on the 
opposite side, (as observed in the note,) and, as a conse- 
quence, have suffered denudation to a greater amount ; 
and their basset edges are driven back further than those 
on the Derbyshire side of the axis. There is, therefore, 
no lateral movement of beds on either side of the Don ; 
neither is the country on the North side vertically ele- 
vated 600 yards above that on the South side, maintain- 
, ing that elevation, as was stated at a previous meeting. In 
fine, the whole phenomena are well described by a writer in 
the Magazine of Natural History, and quoted in the Arcana 
