Can you solve the puzzle...?

A highly entertaining 'ladies day' today (after a very late night). We went on a boat trip to Incholm Island, got attached by nesting gulls, almost got stranded on the island & then walked back to Edinburgh via the Dalmeny Estate.

We passed this big pile of numbered rocks on the way, not really any the wiser but was very intriguing.

All followed by a big steak dinner at the new Millee & Carter Steakhouse (the former Cramond Brig)

Now back home & in need of my bed - shattered