cheaply done, and followed with fuch remarkable 
fuccefs, that numbers foon followed their example : 
fo that it is now almoft univerfally pra&ifed here ; 
and, hitherto, has never been once known to fail, 
in anfwering the defign. In purfuing the fcheme, I 
found, upon trial, that locks and damheads might 
be raifed, at one tenth of the ordinary expence, by 
the help of furze, as a very thin perpendicular wall 
of done and lime, or one of deal-boards, two inches 
thick, is the principal part of the expence. Clofe 
to this wall, on the other fide, is a mound of furze 
intermixed with gravel, and along the top of it (of 
the wall, viz.) a drong tree, equal with the higheft 
part of the mound. It is plain, this wall cannot be 
hurt by the weight of the water, or force of the 
current, as it is defended by the contiguous mound, 
which is fix or feven yards broad ; nor can the 
preffure of the mud and gravel make it give way, 
as their weight is fufpended by the interweavings of 
the furze. If, therefore, the tree on the top of the 
wall can be made to keep its place, the whole is 
firm. 
It is well known, that they make their fea-dykes 
in Holland with faggots of any fort of brufh-wood ; 
and it mufl appear to any one, who examines the 
net- work formed by the erodings of the branches 
and prickles of furze, that it is far more effectual 
for this purpofe, both as it detains the colled:ed 
earth, and is far more cheaply procured than fag- 
gots. 
I hope it will be eafily obferved, from what has 
been faid of locks and damheads, that a great deal 
of 
