Manuscripts/Mixed Material Letter from Aaron Copland to Serge and Natalie Koussevitzky, November 9, 1934.
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63 West 55 St.
Nov 9 
Dear friends --
Just two words to say that I am back in New York after 5 months in the hinterland. My ballet is almost finished and I will be going back to Chicago for the premiere. But not until I have heard the Boston Symphony again! I'm looking forward to seeing you both next week.