British music publisher Boosey & Hawkes has signed 26-year-old British songwriter Grace-Evangeline Mason to be part of its publishing roster. The new agreement covers Mason’s existing works, including orchestral, chamber, choral and electronic works, and the chamber opera “The Yellow Wallpaper,” as well as future commissions.  “I am elated to have signed with Boosey & Hawkes. Some of my very first {…}