Charles Sydney Hopkinson (July 27, 1869 - October 16, 1962) was an American portrait painter and landscape watercolorist. He was born in Cambridge, Massachusetts, and studied art at the Art Students' League in New York City and the Academie Julian in Paris. He maintained a studio in Boston from 1906 to 1962 and painted more than 800 portraits. Among his sitters were Calvin Coolidge, Oliver Wendell Holmes and John Maesfield. Autographed Letter Signed (ALS) on 5x8 stationery in very good condition.