The World's First Rock Band
During the reign of Queen Victoria, several families from Cumbria travelled the country advertising themselves as "rock bands".
These bands were not playing some primitive version of rock and roll music, but performing music on instruments made of rock.
Britain's leading solo percussionist, Evelyn Glennie, has always been fascinated by these instruments and the people who created them.
In this programme, she travels to Cumbria to locate and play surviving examples of the strange musical instruments known variously as rock dulcimers, musical harmonicons and geological pianos.