41. What Methods the Mine-men use in following the Vein, and tracing their passages under ground (which they call Plumming and Dyalling) according to the several exigencies? And whether they employ the Instruments, made with the help of the Load-stone, the same way that is usual; and if not, wherein they differ in the use of the same Instruments; or what Instruments they substitute in their place?
42. What ways they take to secure themselves from the uncertainty, incident to the guidance of Magnetick Needles from the Iron-Stone or Ore, that they may meet with under ground?
(of which yet perhaps there is not so great danger, as one may imagine; as far as I could find by a Trial, I purposely made in a Groove, where I was sure, there wanted not Iron-Ore.) And what other wayes may be used to direct Miners without the help of a Load-stone?
43. How the Miners deal with the Rocks and Sparrs, they often meet with, before they come at the Ore? Whether they use Fire to soften, calcine, or crack them? How they employ it, and with what measure of success?
44. What wayes and cautions they use, to free the Mine and secure the Work-men from the inconveniencies and danger accruing from the use of much fire in it?
45. What Instruments they use to break the Rock &c? And how those Instruments are conducive; and how long they last?
46. How the Mine-men work; whether naked or cloathed? And what Lights they use to work by; what materials they are made of, what measure of light they give; how long they last; and by what wayes they are kept burning in that thick and foggy air?
47. How Veins are follow'd, lost, and recover'd? And how several Miners work on the same Vein? And what is the best way of getting all the Ore in a Vein, and most conveniently?
48. How they convey out their Ore, and other things, that are to be carried out of the Mine? Whether they do it in Baskets drawn up by Ropes, or upon Mens backs; and if this last-named way; what kind of Vessels they use for matter, shape, and capacity? And whether the Work-men deliver them one to another; or the same Work-men carry them all the way? And whether the Diggers descend and ascend by Ladders of Wood, or of Ropes, &c.