More than a decade since Scottish harpers Patsy Seddon and Mary MacMaster's first collaborations, their duo, Sileas (pronounced: She-less) remains the only duo of its kind. While they remain rooted in traditional Scottish folk music, Sileas' combination of nylon-strung acoustic harp and brass-strung electro-harp creates a lively, exciting and contemporary sound. Although Seddon and MacMaster have recently focused their attention to the Poozies, the eclectic band that they share with accordionist Karen Tweed and guitarist Kate Rusby, their harp duo has been a regular feature of...