Biography
George Marshall was a civil-liberties activist, economist and conservationist — later a president of the Sierra Club and a council member of The Wilderness Society — who chaired the National Federation for Constitutional Liberties. Cited for contempt of Congress in 1946 for refusing to give the House Un-American Activities Committee the federation's contributor records, he served three months in the federal prison at Ashland, Kentucky, from June to September 1950. He was first jailed in Washington, D.C., before being transferred to the Federal Correctional Institution at Ashland.
The dictionary describes Marshall as a conservationist active in the National Recovery Administration and the Sierra Club. Its 1904 birth year corroborates the existing date at year precision and supplies no additional imprisonment event.
Jacob Rader Marcus, editor, and Judith M. Daniels, associate editor, The Concise Dictionary of American Jewish Biography, printed page 422 (PDF page 421).