210 GRAVEL RIDGES IN HOLDERNESS AND NORTHUMBERLAND. 
the plain like a vast chesil-bank on the sea-shore, being about 50 feet 
high, and 100 broad at the base, and nearly a furlong in length, and 
has at first sight the appearance of an artificial military mound ot 
enormous magnitude: it bears marks of having been applied to mi¬ 
litary purposes, but is clearly of diluvial origin. 
There is also in the county of Northumberland a similar narrow 
ridge of diluvial gravel, resembling a long military vallum, which runs 
some distance, nearly parallel to the great north road, a few miles on 
the north of Alnwick; it is on nearly the highest point of an elevated 
plain, and is intersected near its south extremity by the public road, 
and in several other places by gaps that have been cut through it to 
enter the adjacent fields. I hope hereafter to be enabled to give a 
more detailed account of this gravel bank, which I expect to receive 
from my friend W. C. Trevelyan, Esq. of Wallington. 
