musical sounds it has yet produced in our concert rooms.” The New York Times described how “the instrument got out of gear and its inventor, Leon Theremin, was called onto the stage to set it right ... Mrs. Rosen was in command of its resources all evening. She plays the theremin, not only with an awareness of its possibilities, but with a knowledge of music.” Reviews such as these were quite satisfying to Lucie, proving that the theremin was indeed a serious instrument and she was no dilettante. That same year, Lucie Rosen gave a successful concert in London, deciding then to return the following year with a grand European tour. She played to enthusiastic reviews in Naples, Rome, Venice, Zurich, Munich, Budapest, Hamburg, Stockholm, Oslo, Copenhagen, Amsterdam, Brussels, Paris, and London. Lucie also continued performing in the United States giving numerous concerts in New York City and throughout the Northeast, again to rave reviews. “Lucie Rosen is one of the most original women in New York’s social world,” The New York Evening Journal observed. “She has a very curly blond hair which fuzzes out into a wide halo around her delicate and ethereal face ... her robe de style evening gowns are said to be designed by Mr. Rosen.”(February 3, 1936) By late 1938 the Walter Rosen was reconsidering his support for Leon Theremin. The inventor had a significant amount of unpaid taxes, the FBI was monitoring him, and his personal life was in shambles. He was also seriously behind in his rent payments. Later that year Mr. Rosen, in his typically gentlemanly tone, wrote Theremin a letter demanding he vacate the brownstone. “... With all the good will in the world, it is impossible ... to permit you or the Teletouch Corporation to occupy number 37 West 54th Street. ... I ask you to be good enough to leave everything ... that belongs to Mrs. Rosen or myself.” Just before Leon Theremin fled the country, he completed a new instrument for Lucie Rosen. She named the September Theremin and it remains the most powerful and technologically advanced instrument ever built by Theremin. The September Theremin is on display at Caramoor's Rosen House, alongside a Moog Music Etherwave Theremin. Lucie made absolutely certain she knew every detail of the instrument, each placement of tube and wire, so that she could tune and repair the instrument as she believed she