 This work included the completion of Alexander Borodin's opera "Prince Igor", which Rimsky-Korsakov undertook with the help of Glazunov after Borodin's death, and the orchestration of passages from César Cui's "William Ratcliff" for its first production in 1869.He also completely orchestrated the opera "The Stone Guest by "Alexander Dargomyzhsky three times—in 1869–70, 1892 and 1902.While not a member of The Five himself, Dargomyzhsky was closely associated with the group and shared their musical philosophy.