Mitchell, Howard. (1910 - 1988) Signed PhotographA superb original glossy 8 X 10 inch photograph, in very fine condition and boldly signed by the American cellist and conductor who led the National Symphony Orchestra from 1950 to 1969. Mitchell "personified the optimism that permeated Washington and America after World War II; he socialized, schmoozed and charmed the ladies of high Washington society, fitting right in, playing the role of music director as he played the cello. He saw the symphony as