What is associated with: a 1920s discovery proved that some of the instruments used in this 1871 opera were historically accurate?

What is associated with: a 1918 treaty said if the royal family produced no male heirs monaco would come under this cou… What is associated with: a 1919 shaw play subtitled a fantasia in the russian manner is an homage to this playwright wh… What is associated with: a 1920 robert frost poem begins some say the world will end in this some say in ice? What is associated with: a 1920s dance or a city in south carolina? What is associated with: a 1920s french production of this musical about 19th c entertainers was titled mississippi? What is associated with: a 1920s hit by sammy fain irving kahal wanted you to let this be your umbrella? What is associated with: a 1920s hunting trip to canada inspired birdseyes food preserving method? What is associated with: a 1920s query asked will it play in this illinois town that experts considered a bellwether?