A book all about the Welsh love of song, and the singing of hymns in particular, and how hymns and the religious movements and revivals of which they were part fired the Welsh imagination. By the middle of the nineteenth century, Wales - thanks to a repertoire of appealing hymns and an easily-learned form of musical notation - was the fabled sea of song. Other nations were drawn to the siren-like power of hymns but perhaps no other has sung them with...