1978. At Wallabrook clapper bridge. Dartmoor. Edinburgh Arts 1978.
26 June - 2 July 1978. Edinburgh Arts participants at the Wallabrook clapper bridge, over the Walla Brook near its junction with the North Teign river, Gidleigh Common, Dartmoor. Simple stone bridges of this sort, though often thought to be prehistoric, mostly date from the 14th to 19th centuries. Edinburgh Arts 1978.