ke 
THE WEST OF ENGLAND AND EAST OF WALES. 437 
submergence must have reached at least from 500 to 650 feet (as 
already stated) before they could have been transported. Most of 
them consist of a kind of granite which must have come from the 
upper part of Criffel mountain, and some of them may have come from 
other granite heights in Kirkeudbrightshire. The larger granite 
boulders may be seen most thickly congregated about Seisdon, in 
the lane between Seisdon and the ‘ Fox’ inn, and north of the ‘ Fox’ 
inn, where I saw many which had lately been dug out of a loamy 
clay. About Trescott they are very abundant, and many may be 
seen in the lanes branching off north and south from the Wolver- 
hampton and Bridgenorth road. They are well represented in the 
streets of Bridgenorth, especially near the river, where I saw no 
other kind of granite, though a little Eskdale might probably be 
found. ast of Seisdon, along the Wolverhampton road, Criffel 
granite nearly disappears until the immediate neighbourhood of 
Wolverhampton is reached. Many large boulders of it may be 
found in the poorer quarters of the town, especially in back lanes 
and courts; and numerous moderate-sized ones have been dug out 
of the numerous clay-pits near the Hospital, Clarkson’s clay-pits, 
&c. North of Wolverhampton, at Bushbury, they are very large 
and numerous, especially around Moseley Court, near the church, 
and on the top of Bushbury hill close to a large gravel-pit. They 
may be found some distance north of Bushbury, but gradually thin 
out in the direction of Stafford. About Bushbury they are associated 
with many large Lake-district felstones, which are not conterminous 
with the granite, excepting on the east, where there may have been 
a persistent local obstruction (see I. $5). The great mass of the 
Criffel concentration between Wolverhampton and Bridgenorth gra- 
dualiy thins out north towards Pattington, though a number of 
large boulders may be seen at least as far north as Albrighton. 
The south boundary of the concentration is, in most places, very 
sharply defined. It extends from a short distance south of Bridge- 
north to Mose, and thence by Bobbington to Swindon (near Himley), 
between which and Stourbridge I could not see a single fragment of 
granite or any rock foreign to the district. Neither could I see a 
fragment of foreign rock between Swindon and Dudley. Last of 
Swindon the Criffel boundary runs north-east towards the neigh- 
bourhood of Wolverhampton, and thence northward by Bushbury 
hill. The great Criffel concentration is therefore somewhat crescent- 
shaped, the convex side being the §.8.K., or the side furthest from 
the source of the dispersion. In this respect it bears some resem- 
blance to a terrestrial glacial moraine. Its length from the neigh- 
bourhood of Bridgenorth to the neighbourhood of Bushbury may be 
roughly estimated at about fifteen miles, and its breadth about four 
miles. The largest granite boulders I have seen in this concentration 
are at Trescott, reaching nearly 5 x3}x3 feet, and at Bushbury, 
reaching 44x%4%x3 feet; but I have been credibly informed that 
they reach a larger size near Seisdon, and that some very much 
larger have been buried. There must be many thousands more 
than 3x 2x2 feet; and taking all sizes down to 1 foot in average 
