Located on a patch of grass where Lauriston Place Meets Forrest Road, are the relics of Middle Age plumbing. To the untrained eye, these logs with the center hollowed out look like discarded lumber. Luckily, for keen observers, there is an informational placard that provides context on the objects. Several hundred years ago, Edinburgh was a walled city. This stone structure provided safety and security for residents. There are remnants of the Flodden Wall located nearby. Unfortunately, there was no massive body of water within the enclosure. So, authorities had to…