OF CORNWALL. 167 
nography or plan of the fame lode and its difperfed fhodes ; C C is 
the lode ; G H the courfe of the diodes : Suppofe a man at S, on 
the declivity of the hill to have found a fhode in the faft , well 
flocked with tin ; in order to difcover the lode whence it came, he 
links a pit or fhaft, about lix feet long and three wide, at L, 
above the place where the firft fhode was found (the pit may be about 
eight feet deep, more or lefs) ; and finding a fliode like to the firfl, 
he proceeds up the hill to fink a fhaft more at M, then at N and O ; 
and if he finds the fhodes lefs fmoothed as he advances, growing 
deeper and in greater plenty than at firft, he may confidently allure 
himfelf that he is growing nearer and nearer to the lode defired : 
finding at laft at O, that the fhodes lie as deep as the folid karn, he 
is certain to cut the lode C C in a few paces : if he does not find 
any fhodes in the train L M, he begins in another direction, and 
finks a fide-lhaft at P, or any place next adjoining, keeping the run 
of the hill ftill at right angles, till he finds a fhode of like fub- 
ftance to the firft, and then purfues the lode in the forementioned 
manner. 
No one in Cornwall can fearch for tin in this or any other man- sect.ix. 
ner, where and when he pleafes. If the land where the Ihode jg Of bounds 
found is inclofed and not bounded \ the leave of the Lord of the for torching! 
Soil muft be firft obtained ; if the land is bounded, then is the 
bounders confent only neceflary ; but if the land is neither bounded 
nor inclofed, but a waftrel or common, then may any one mark out 
bounds there, (obferving the legal forms) and fearch for tin. Thefe 
bounds are the limits of particular portions of ground, containing 
fometimes an acre, fometimes more, but oftentimes lefs ; they are 
little pits dug in the ground about a foot wide and deep, at the ex- 
treme angles of certain parcels of land, by drawing ftraight lines 
from which, the extent of thefe bounds is determined ; in like man- 
ner as in geometry, by drawing ftraight lines from three or four 
points, the extent of a triangle or quadrangular fuperficies is 
known. 
The lode being found, three things are neceflary to be confidered sect. x. 
by the miner ; firft, to difpofe of the barren rock and rubble ; fe- mini o?, a j 
11 it i i i«i 11 i i r now pracufed 
condly, to dilcnarge the water which every lode yields more or lels, in Cornwall, 
and generally in quantity fufficient to obftrud the labourer, if not 
duly attended to ; thirdly, to raife the tin ; and all thefe are eafily 
performed when the workings are near the furface ; but the diffi- 
culties increafe with the depth, and fkill and care become ftill more 
and more neceflary, and indeed all the mechanick powers, the 
tnoft forcible engines, and the utmoft fagacity of the chief miners. 
