Who designed and constructed the 7 stanes?

See Andy, Davy and auld Wizzy often
Have got a 2nd edition map with a cryptic credit on it. Reckon PL had something to do with that 💡

Thanks, davy-g, for the resurrection of a most interesting thread. I missed it first time round. The Stanes are, in some ways, taken for granted. It’s good to hear some of the story of how they came about.