Some great images there. Re Oldknow's Seat., I've always wondered where it is, and indeed, whether it still exists. Does anyone know?
Yes, it is still there but it is broken. It's just over the wall / fence of the golf club and can be accessed via Linnet Clough Scout camp (although I don't believe there is any right of way). The seat is repairable and I've mentioned a number of times to Mellor Archaelogical Trust that they should include its repair and reinstatement as part of their Oldknow's Legacy Project. I'm not sure if they did or will but it would be a great shame if not.
To see what Oldknow used to see when he sat there would need some treework done but not a huge amount. I have some photos somewhere - I will see if I can find them.