Marie Van Vorst (November 23, 1867 — December 16, 1936) was an American writer, researcher, volunteer during World War I, and painter.Marie Louise Van Vorst was born in New York City, the daughter of Hooper Cumming Van Vorst and Josephine Adele Treat Van Vorst. Her father was a judge on the New York City Superior Court and president of the Century Club. Less