by Linda Seida 　　  　　William Jackson helped establish the group Ossian more than 25 years ago before moving on to a solo career as a composer and recording artist. He recorded half-a-dozen solo albums and contributed to another eight as a member of Ossian. Early in 1999, the noted Scottish multi-instrumentalist won a competition whose aim was to discover his country's new anthem. Jackson's "Land of Light" clinched it, and the song appeared on a CD a few months later. It was also featured during the Queen Mother's birthday celebration that summer, marking the 100th anniversary of her birth. His other compositions include "Inchcolm," "St. Mungo," and "The Wellpark Suite"; the commissioned "A Scottish Island" for the Scottish Chamber Orchestra; and numerous works for television, including programs for the History Channel and the BBC. Jackson attended the London Guildhall School of Music and devotes himself to music therapy, aiding children afflicted with autism and cerebral palsy. Jackson also teaches at workshops in music therapy and he takes part in the International Harp Therapy Program.