SPOILERS

page 46 (semi last paragraph) states that

''... Like the lightning stone, the PCs will have to devise a safe way to transport this stone back to town - perhaps they can cannobalise the brass lighting rod from the mausoleum''.

I fail to how cannibalizing the rod will help them transport the stone to town. What am I missing?

I think the idea is you strap the rod to the headstone and leave it trailing behind touching the ground (whether you are moving it by hand or on a cart). Then the theory goes that when lightning strikes the headstone it will take the easiest route to the ground - which will be through the rod rather than through one of the PCs.

I simplified matters than just said that the headstone (and all fo the other stones for that matter) only attracted lightning when they had been static for 10 minutes.

The thing I'm wondering is would someone completely encased in plate and chainmail suffer the effects of lightning damage?

Would his/her armour act as a faraday cage and carry the current over the surface of the armour instead of through it to the player?

Or is a case of it's considered magical damage due to the circumstances of the adventure?