where to fink an Air-fliaft, when occafion requires 5 yet in 
the higher Mountains of Dartmoor there are (bn>e confide- 
rable Loads, whick run l^orth South: thefe unde^ly 
towards theEafl:* 
8. Four or five Loads may run parallel to each other in 
the fame Hill, and yet (which is rare) meet all together in 
one Hatchj as it were in a knot, (which well tins the place,) 
and fo feparate againjand keep their former diftanc€s»Such 
a knot hath been obferved 5 and wrought on Hingfiony a 
known lVlineral-D<?n?« ox Common in Cornwal{mt\i\ntv^o 
miles ofwh^ch particular place I have formerly lived fome 
years*) 
9. The breadth of Majier loads mzy generally be from 
3 to 7 foot broad 3 feldome larger 5 unl^ at certain pla- 
ces, as in the Scheme at // 5 or where feveral Loads may 
chance to make a knot^ or fend forth firings or veins 5 nei- 
ther retain they their udial breadth in all parts : for^ they 
may be 6 foot at gg^ fcarce 2 at ^4 5 ^^ay fometimes fcarce 
i* inch over 5 but that is to be underftood of firings and 
the narrowefl places of the concomitant ones* 
10. The Loadisufually inanhard (i.e. in a Rocky or 
Shelfy} Countrey , made up of metal, fpars and other 
weeds^ and as it were all along a continued Rock 5 but 
hath many veins and joints, aswefpeak ^ but in fomefof- 
ter Countries^ the Tin may lie in a fofter confiftence^as that 
of clay in a manner petrified, whereby it may rationally 
be expeded, that they make more fpeed and (hew in their 
Drifts, and the before- cited number of Beele men imploy 
more Shovel-men. 
II» Concerning Water, we have thefe obfervables^ 
that in moft places we meet with it at fome feet deep from 
theLoady furface,in other fome not at many fathom deep* 
It runs commonly through the heart of the Load, not in a 
direft continued Channel, but vvindingly in and outj in- 
fenfibly through the veins and joints of the Lo?.d, 
17, When we are come at any depth, and find the wa- 
ters begin to annoy us 5 as it quickly will if any be in the 
T t 2 vvork3 
