ther drift at ten fathom, and fo deep as wepleafe. Now 
when we once pafi that level ^ on which our Adit runs^and 
the water begins to trouble US5 we have this remedy 5 ei^ 
ther with a Winder and keebles, or leathern bags, pumps, 
or buckets to getit up to the Adit-level, and fo we are 
enforced to do to the very top, where we have not the 
convenience of an Adit, as in plains. Some, but very few^ 
works may be dry. 
15. Weobferve, that if we have Water^ we never wani 
Mr fufficient for Refpiration, and our candles to burn in ^ 
but yet this caution muft be annexed 5 that in afoft loofe ; 
quagmire, clayie Countrey, by the falling of the Deads 
after usj yet not in fuch meafure, as totally to (top us up, 
albeit we have water (and it may be too much^ yet our Air 
is rather too copious , or fo much condenied, as that it be- 
comes in a manner a damp, and requires an Airflbaftfor 
vent ^ which damps are fometimes enlarged by working ofl 
the Mmdick^mihtht Ore* 
i6* In caft the Countrey be not ftrong enough ( as be* 
ing over foaked with water from above) to fupport its 
own weight, we under-prop our Drifts with Stemples^and 
Wall plates, placed much like a Carpenters (quare, onthe^ 
one fide, and over head. 
This being the moft ufual way of Digging,and Landing; : 
our Ore, we will haften to give youan Account of 
T be Manner and Way of J^tdsmg 
Tinn. 
Although this be the eafieft in refped of skill and la^ 
borjinfomuch that it is commonly the task of theLads^that 
are but new beginners^yet I (hall not fcruple to fet it down^ 
together with the defcription of our Mills^and other necef* 
fariesj as fuccindly and diftiaftly^as I may. 
