OF THE MENAI BASIN. 
225 
Caslle and the little town of Aber, enters Beaumaris Bay, 
three miles to the south of Penmaen Maur. 
The Ogwen, presenting more of the characters of a rapid 
mountain -torrent than any of the streams of this basin, 
being impeded continually in its descent by vast frag- 
ments of rock, issues from the dark gloomy Lake of Og- 
wen. It then passes through the romantic vale of Na7it 
Francon, or the Vale of the Beaver ; and, having on the 
south bank the Dolawen slate-quarry iron-railway, and the 
new Holyhead road, it passes into the Bay of Beaumaris, 
half a mile to the south of Port Penryn. For more than 
five miles of the lower part of its course, the banks of the 
Ogwen are most beautifully fringed with natural wood. 
The Cegin, an inconsiderable stream, after putting in 
motion some machinery, enters the bay at Port Penryn ; 
and forms the quay whence the Dolawen slate is shipped to 
all quarters of the globe. 
Next in order, but much superior in size, is the Seiont, 
which has its source in the two charming lakes of Llan- 
berris. From the quantity of water it receives from the 
many small rivulets which furrow the face of the lofty 
Snowdon, the Seiont may be considered the largest river 
of the basin of the Menai. Except where it passes the 
woods of Llandenon, this river has its banks naked and 
woodless. After washing the walls of the Castle of Car- 
narvon, and forming a harbour for shipping, it enters the 
Menai Strait. 
The Goorfai rises in the small but pretty lake of Quet- 
lyn, and in its descent runs through some fine meadow- 
ground ; and within two miles of its mouth, near Poolhelly- 
road, affords delightful scenery. 
The last river of any note of this basin, is the Nantle, 
which, taking its rise from the two lakes of Llanlyfne and 
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