Returning to New York to work on Billy Rose's Aquacade for the World's Fair, he came to the attention of Max Dreyfus who ran the in-demand theater orchestration department at Chappell Music.
His legitimate Broadway start was assisting Spialek and Walker with the orchestration duties for the George White Scandals of 1939, featuring Ella Logan, Ann Miller and The Three Stooges.
Other principal orchestration credits were for Loesser's first show Where's Charley?, Harold Arlen's House of Flowers, the cult classic Flahooley and Mr.
[7] He accepted minor arranging chores from Irwin Kostal for forgettable television programs and did the scores for a pair of silent film compilations.
[8] During the late 1940s, Royal had taught composition and arranging at the Juilliard School and in his retirement wrote a couple of unfinished textbooks on orchestration, which are in his papers at the Music & Performing Arts Section of the New York Public Library.