sentences:  He moved to Charleston where he began the practice of law on January 1, 1915 with James B. Heyward, as well as pursuing his agricultural interests.McMillan served in the South Carolina House of Representatives from 1917 to 1924 and he served as speaker from 1923 to 1924.In addition, he was the head baseball coach at The Citadel from 1916 to 1919; for five years before law school, he had played professional minor league baseball with the South Atlantic League.