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The following biography is from the archives of askArt:
The following is from Geoffrey Fleming, Director of the Bridge Hampton Historical Society in Bridgehampton, New York:
DEWITT M. LOCKMAN, N.A. (1870-1957)
Dewitt McClellan Lockman, N.A. (July 30, 1870-July 1, 1957). Landscape, genre, historical, and portrait painter. Born in Brooklyn, the son of Mary Tainter Abbe (1840-1913) and Jacob Kennedy Lockman (1829-1904).
A child prodigy, he began painting at the age of four and was mainly self taught except for a few years in his middle-teens when he studied briefly with James N. Beard, Nathan N. Bickford, and William Sartain, A.N.A. Lockman was the youngest exhibitor ever at the National Academy when he exhibited a black and white drawing there in 1880 at the age of ten. He was also one of the youngest artists to ever exhibit in Paris, and studied there during 1891-1892, and then in Holland during the years 1901-1902.
As a young man Lockman did numerous studies, sketches, and pastels of animals, landscapes, and the human form. Later he began to focus more exclusively on portraiture, becoming so well regarded and in demand that in the middle of the Depression (1930's) he was commanding $3000 per oil portrait.
Though Lockman was born in Brooklyn, he could often be found in Connecticut at his family's estate near Windham. There, he continued working, creating studies of farm buildings, animals, and the local populace, many whom he would use as subjects for his works in the genre format.
Lockman was elected to the National Academy in 1917 as an Associate and was elected as a full Academician in 1919. He exhibited widely and held numerous posts of distinction in the Art World. He was the Founder and Vice-President of the National Association of Portrait Painters (1912-1925), President of the several important institutions including: The National Association of Portrait Painters (1925-1957), Allied Artists of America (1945-1946), and The National Academy of Design (1949-1950.
He was also Librarian [1923] and School Committee Chairman [1922-1925]), and the Associates of the Art Commission (1949-1951). He was a trustee of the New York Historical Society (1925-1957), Secretary of the Society (1929-1957), and Chairman of the Society's Committee on Fine Arts (1930-1948). During World War I he was Treasurer of the American Artists Committee of One Hundred La Fraternite des Artistes, Paris France (1915-1919), and also served in the Office of Naval Intelligence (1917-1918) during America's involvement in that war.
He was a trustee of the School Art League of New York (1928-1939), The Metropolitan Museum of Art (1949-1950), and was a "Fellow in Perpetuity" of the Met from 1951 to 1957. He was the Director of The Municipal Art Society (1933-1935), and served as a board-member of the American Artists Professional League (1933-1957). During his lifetime he received numerous accolades, including the Silver Medal at the Panama-Pacific International Exposition (1915), The Lippincott Prize of the Pennsylvania Academy of Fine Arts (1918), the Gold Plaque awarded by La Fraternite des Artistes for services as the Officer of the Relief Fund for the Families of French Soldier-Artists (1919), the Isaac N. Maynard Portrait Prize at The National Academy of Design (1922), and was awarded Gold Medals from the New York Historical Society (1933), the Allied Artists of America (1936), the Hudson Valley Art Association (1957), and the University of Tampa (1957).
He was a member of the New York Historical Society (1890-1957), American Fine Arts Society (1891-1957) The St. Nicholas Society (1891-1957), The Municipal Art Commission of New York (1925-1929), The Municipal Art Society (1928-1957), The Associates of the Art Commission (1929-1957), The American Artists Professional League (1933-1957), The National Sculpture Society (1950-1957), and The National Institute of Arts and Letters (1931-1957). He was a member of The Brook (NY), The Century Association (NY), The Lotos Club (NY), and the Metropolitan Club (NY).
His works are held by dozens of institutions, some of which include: The Metropolitan Museum of Art, National Academy of Design, New York Historical Society, Pennsylvania Academy of Fine Arts, Portland Museum of Art, Newport Historical Society, Unites States Military Academy at West Point, and Yale University.