OF THE MENAI BASIN. 
247 
and are similarly used. Before the manufacture of the 
Scotch kelp, a much superior article in the arts, the sea- 
weeds of Anglesea were burned and prepared for market. 
Coal is found in Anglesea, though not abundantly. It 
fills a small narrow basin, crossing the island from south- 
west to north-east, which seldom exceeds four miles in 
breadth. It is found to the north of the river Ceint, and 
between it and the river Breint. It ranges from the mouth 
of the Maltraith Marsh to Red Wharf Bay, and appears 
to be deposited upon the limestone of the latter place. The 
strata at the sides of this coal basin are sometimes observed 
to lie edgeways, or perpendicularly inclined, to the horizon. 
The interior of this basin to a considerable distance is over- 
laid with a thick peat covering, forming Maltraith Marsh, 
The strata that is sunk through in arriving at the coal, 
are the following : — 
1. 
Sand, . . . 
. 5 feet. 
Sandstone, . . 
. 66 
3. 
Black shale, . 
. 6 
4. 
Good coal, . 
. 3i 
5. 
Indurated clay, 
.2 
6. 
Sandstone, to a 
great unknown depth. 
In all the pits the workmen suffer much from water, 
which would require more powerful engines than they now 
employ, to keep the working free of it. 
The most valuable, however, of all the productions of 
Anglesea are its mines of copper. They exist in the Paris 
Mountain, which is divided between two proprietors. The 
Marquis of Anglesea possesses the Mona mine. Colonel 
Hughes the Paris; but they form only one mine, being 
contiguous to each other. They were discovered in 1768, 
and have ever since been wrought. 
