Edgar Erastus Clark (February 18, 1856 – December 1, 1930) was an American attorney, railway union official, and government employee. The chief executive of the Order of Railway Conductors for more than 15 years, Clark served on the Interstate Commerce Commission from 1906 to 1921, and was its chairman from 1913 to 1914 and 1918 to 1921.
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