Dark Catacombs - O'Loughlin - Concert String Series - Full Score is arranged for Medium easy / Medium Level. This series has four different performance levels to provide you with a highly focused repertoire for your orchestra and string orchestra, Each level has been carefully designed and graded, within specific guidelines. Instruments include: Violin 1, Violin 2, Violin 3 ( Viola T.C ) Viola, Cello, Bass and Piano.