236 REV. W. THORP, B.A. — AGRICULTURAL GEOLOGY, ETC. 
of the oolitic iron-stones, he enumerates the beds of iron-stone which 
were then worked in the West Riding, the principal of which is the 
one overlying the Black Bed Coal of Low Moor. The yield from this 
bed is about 1,000 tons per acre, and its extent is about six or seven 
miles. The musselband iron-stone above the Upper Flockton Coal 
can be traced over a tract of country about 15 miles in length, 
extending from Flockton to Tankersley Park ; the yield from this 
bed is about 1,200 tons per acre. A third iron-stone occurs above 
the Swallow Wood Coal, worked by Earl Fitzwilliam, which is about 
seven inches thick, and yields 600 tons per acre ; six other iron-stones 
above the Ashton common coal, the Abdy, and the Kent's thin coal, 
all near Rotherham, the black mine above Park Gate Coal, and the 
bands above the Thorncliffe thin coal, and the Silkstone Coal. 
In 1848, Mr. Thorp was asked by a friend of Mr. Osbaldiston, 
to go to Ebberstone Lodge, in the Vale of Pickering, to ascertain if 
there was any probability of finding coal. A bore hole had been 
made to the extent of 140 yards, and at a depth of 43 yards, coal 
2 feet thick had been found of very inferior quality, and they were 
wishful to ascertain whether the coal measures were within workable 
distance. Mr. Thorp advised the boring to be abandoned, when he 
was requested to inspect an ironstone 6 feet thick, recently found in 
another portion of the estate. He accordingly made a tour into 
the valley of the Esk, and much to his surprise found that 6 feet of 
solid ironstone, with 10 yards of intervening strata dividing it mid- 
way, occurred in the district. The yield from this he estimated at 
2i tons per cubic yard, or 24,000 tons per acre, the value of the 
ironstone being lis. per ton, and the cost of getting, 20d. per ton. 
The ironstone was carried into Durham to be smelted. This bed of 
ironstone is between 60 and 80 yards below the alum shale, or Upper 
Lias beds of Phillips. Mr. Thorp proceeded to enquire the extent of 
the ironstone, and was convinced that it could not extend to any 
great distance southward, the entire Lias series in the neighbourhood of 
Pocklington being only 25 yards thick, but northwards, about four 
miles south of Middlesbro, under the Stapylton Estate, and at Eston 
Hall, it is 14 feet thick of clear ironstone. Professor Phillips and 
Mr. Holt liad affirmed that the iron on these estates alone would 
