Born March 14, 1898 in Paris, both parents were artists. The Marsh family returned to American in 1900, settled in Nutley, New Jersey. While at Yale, illustrated the Yale Record, also was unhappy art student at Yale Art School. After graduation from Yale in 1920, became freelance artist for newspapers and slick-paper magazines. In 1922 became staff artist on Daily News to do daily drawings of city life. In 1925, became one of original staff of The New Yorker. In 1922, began to study painting at Art Students League. In 1925 went abroad, discovered Old Masters. Met Mahonri Young. In 1927-1928, studied at Art Students League under Kenneth Hayes Miller. Worked in watercolor more successfully than in oil. In 1929 began working in egg tempera. Maintained his studios around 14th Street in New York where he was in the midst of the city life which was his favorite subject. In late 1920's began to make prints. Began with lithography, then turned to etching. In 1940's took up copper engraving and studied at Hayter's "Atelier 17." did murals in fresco for Treasury Department Art Program in 1935 and in 1937 did murals for the Custom House in New York. Also worked in Maroger medium and in Chinese inks. In 1945 published book, Anatomy for Artists. Taught at the Art Students League from 1935 on. "The gist of his teaching he once summed up: 'Art is derived from two sources: art and nature. All art is a mixture of the two. The greater the degree of each, the greater the art'. Thorough study of the figure, technical procedures, and the old masters, was the foundation of his teaching." He died in Dorset, Vermont, in 1954.