INTRODUCTION. 
XI 
Wooler, and returning by Belford, Alnwick, Morpeth, Newcastle, Pon- 
teland, Corbridge, and Ebcliester, to Durham, * my southward route 
passed by the West Pits, and, entering Yorkshire at Barnard Castle, 
continued by Brignall, Arkendale, Reeth, Leyburn, Masham, Ripon, 
Ripley, Harrogate, and Harewood, to Leeds. Here I found Mr. E. 
George engaged in the details of local geology, and employed myself 
in making a MS. geological map of the vicinity. After another 
visit to the mines of Swaledale, my wanderings closed at Nottingham. 
In Jan. 1822, I accompanied my kind relative to examine the 
limestone country of Conishead priory (Ulverston), Cleator near Egre- 
mont, and Hesket- Newmarket. In August of the same year I walked 
from the east coast of Durham through Teesdale, crossing the great 
Penine escarpment by the Hilton mines, and rejoined Mr. Smith at 
Kirby Lonsdale. After spending many months at Hesket-Newmarket 
we returned again to Kirby Lonsdale, and from this delightful station 
explored minutely a large region of slate, limestone and millstone grit, 
and collected abundance of fossils. 
In 1824, 1 walked from Kirby Lonsdale to York, chiefly following 
the valley of the Aire ; and it was in arranging the small collection 
then belonging to the Yorkshire Philosophical Society, and in drawing 
for Mr. Smith’s Lectures, that I first resolved to follow out the recom- 
mendation of the Council of that Society, and to devote a considerable 
portion of my time to the Illustrations of the Geology of Yorkshire. 
My lamented friend E. S. George walked with me to Greenhow hill, 
and through a part of Wharfedale — one of the most instructive short 
journeys I ever made, and the first in which I used the mountain 
barometer — an instrument of inestimable value, where exactness is de- 
sired in investigating a complicated series of rocks in a district like 
that of the Yorkshire dales. 
* I he observations made during this Tour in Northumberland were the ground-work of 
Mr. Smith’s geological map of that County. 
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