WITH THE YORKSHIRE COAL-FIELD. 
109 
The levels first range nearly East, and afterwards nearly North. A 
short distance further the escarpment of the Lime Coal is met with, 
and next, the escarpment of the Cromwell Bed, which, I believe, is 
identical with the Park Gate Coal. Proceeding to the division of 
the townships of Hartshead and Mirfield, and near the old Hudders- 
field and Leeds road, a considerable ' throw' up to the South is 
found. The extent of this elevation is supposed to be not less than 
one hundred yards, which opinion is corroborated by the levels. The 
line of section then intersects another outcrop of the Blocking Coal, 
which may be traced through the village of Mirfield to the south side 
of the river Calder, where it has been worked by the TVheatley's and 
the Walker's. In the township of Thornhill the ground rises south- 
ward from the river, and sufiicient cover is obtained for the Lime 
Coal or Wheatley's Three-quarters Coal and the Cromwell Bed, 
which have been worked for many years by Messrs. Wheatley. I 
have taken many lines of water levels here, but I have not been able 
to ascertain the average dip of the strata, owing to their distracted 
state. From this high ground the line of section descends the dell 
in Mr. Ingham's estate, where the Cromwell Bed is worked ; and 
further on it crosses the outcrop of the Flockton Coal ; then climbs 
the bold escarpment of Bradgate Rock, on which stands the village 
of Thornhill, and proceeds along a plain about a quarter of a mile in 
length to another escarpment, on the brink of which are Mr. 
Ingham's Collieries working the Flockton Thin Coal. A deeply 
denuded valley separates this clifi" from the rising gi-ound of Emroyd, 
under which Messrs. Briggs and Stansfield are working a seam of 
coal that lies about eighty-one yards below the Flockton Thin Coal. 
The levels in Emroyd Colliery generally range nearly East and West. 
Having attained the summit of the Emroyd ridge at a point about 
half way between Overton and Middlestown the line of section des- 
cends into the Coxley valley, passes through the steep wood on the 
opposite side, and goes over another hill between Midgley and Nether- 
ton, into the Bullcliffe Wood valley. It then traverses an elevated 
ground in the township of Bretton, crossing the Den by Dale road at 
Sunwood,and proceeds towards Woolley. The district between Middle- 
ton and Bretton is almost unexplored ; the geological information 
