Plans for enclosing the well

Looking though the treasure trove of documents from the Traquair archives, this set was fascinating. It is plans for enclosing the mineral well at The Wells. We don't think it was ever built - there is no sign of it. Does anyone know anything about it?

These plans are displayed courtesy of the Traquair House Charitable Trust and by the generosity of Catherine Maxwell Stuart with the assistance of Margaret Fox, Traquair archivist.