He was born in Haarlem and studied with Sem Dresden at the Amsterdam Conservatory ; Mul orchestrated Dresden 's opera Francois Villon after the composer 's death .
Jan Mul ( 20 September 1911 -- 30 December 1971 ) was a Dutch composer , mainly of church music .
Jan Mul was born in Haarlem and studied with Sem Dresden at the Amsterdam Conservatory ; composer orchestrated Dresden 's opera Francois Villon after the composer 's death .
Jan Mul ( 20 September 1911 -- 30 December 1971 ) was a Dutch composer , mainly of church music .