The craft of stone masonry, lime mortar, traditional drystone walls and ecology of drystone walls. Gerhard Stoll, Stone mason and architect Hüeblistrasse 28, CH-8636 Wald, Switzerland, +41(0)55 246 34 55 / +41(0)78 761 38 18 / info(at)stonewalls.ch Traditional stone masonry and traditional building techniques