I'm from Mallorca, a little Mediterranean island near Barcelona, and we have a great dry stone walls tradition there.
The people that do it are called margers in the local language. They never really disappeared, and they finally formed a guild a couple of years ago.
Here are some pictures if anyone is interested:
https://www.google.com/search?newwindow=1&biw=1745&bih=906&t...
https://www.google.com/search?q=margers+mallorca&newwindow=1...