(Photo: Genevieve Girling) The main opera presentation at this summer’s Buxton International Festival was Ambroise Thomas’ 1868 composition, “Hamlet,” to a libretto by Michel Carré and Jules Barbier. Although initially successful, it eventually faded from the international stage as the popularity of French grand opera declined; its last Parisian performance took place in 1938. In 1978, however, a staging in {…}