Solution
In November 2018, I blogged about a walk I took on Longstone Edge. There I came across a small stone platform upon which was a metal plaque that read "Ruby's Chair". You can read about it here . It was a mystery until last weekend when the platform's maker got in touch with me and kindly provided this explanation:- "Hi Longstone Moor Farm was run by my family from 1943 to 2020 and I have spent a lot of time up there. About 9 years ago me and my daughter who was 8 years old at the time were having a picnic on Taylor Lane. In the lane was an old broken limestone gate post and I said let's make a chair with it. So me and my daughter Ruby set to building it and she worked so hard I thought it would be nice to make a copper plaque with her name on. I fitted the plaque to the chair with two rivets with my initials stamped on N S. If you sit on the chair facing into the chair you will see an iron ring set in rock with lead on the other side of the lane. I have s...