he married Elsie Knapp in 1902. Residing at 130 East 70th Street, they had three children, noted physicist Wilson Marcy Powell, Elsie K. Powell and Sarah Powell (Mrs. Prescott B. Huntington). Powell came from a Quaker family devoted to social justice initiatives. His great-grandfather, Isaac Hopper, assisted more than a thousand slaves escape to freedom, and left his mark on several benevolent activities in New York. His father, Wilson Powell, was also a Harvard-educated lawyer of high standing and devoted his energies to the improvement of hospitals and libraries in New York. Among his great-grandchildren are Mayan archaeologist Christopher Powell and writer-producer J Dakota Powell. References 1872 births 1935 deaths American lawyers Harvard Law School alumni Harvard College alumni