Possibly the 'Wadmal Hol' Breckon, North Yell, Shetland.
The rough newly-woven Wadmal was 'fulled' (smothed) on the shoreline by anchorng it to a rock in a place where the action of the waves would 'waulk' (thicken) the cloth.

Wadmal : https://en.wikipedia.org/wiki/Wadmal

Show more