James Mason, an employee of the Music Library at the University of Toronto, Canada, discovered a long lost Violin Concerto by Norwegian composer Johan Halvorsen. The Concerto was first performed in 1909 in the Netherlands by Canadian violinist Kathleen Parlow. She played it two more times that year, and probably there have been no performances of the concerto since. It was said, that the composer was unhappy with the reviews and destroyed the scores. The sore now found in Toronto must be a copy made for Parlow.