Hi C

I'm running late with this how to do it guide, although its really looking good (apart from it doesn't tell you how to do it yet!).

I thought I'd show you the main question:
I found this:
"When the forts have been placed on materials practically infusible, as on the quartzose conglomerates of the Old Red Sandstone, as at Craig Phadraic, and on the limestones of Dun Mac Uisneachain, pieces of fusible rocks have been selected and carried to the top from a considerable distance."
My fort at Wincobank in Sheffield had sandstone melted on its ramparts too - wouldn't it be wierd if it was from the same source as that at Craig Phadrig?