Born in Hamilton County, Ohio. He moved to Columbus, Ohio, in 1880. He earned a dental degree by apprenticeship with Dr. Kirk. He practiced dentistry in Columbus for 50 years. Married Cora Dell Bailey July 3, 1893. They had a daughter.

Henderson conducted seven auction sales from 1932 to 1938 including the 1938 ANA convention sale. He served on the ANA board of governors. He was ANA vice president for one term and 8th ANA President August 14, 1909, to August 31, 1911. During his term in office the ANA was granted a federal charter. Assistance came from his friend, Congressman W. A. Ashbrook. Henderson was made an honorary life member. He served on the Assay Commission in 1911, 1916, 1920 and 1921. He was a member of the Masons. He died at home in Columbus, Ohio. In 1972 he was elected to the ANA Numismatic Hall of Fame.

Henderson and his wife attended 29 ANA conventions together. She continued to attend after his death. She died in 1968 at age 92.

photo: NUM 22 Sept-Oct 09 page 261

bio: NUM 74 Oct 1961 p 1361-1364

obit: NUM 55 Jun 1942 pages 604-605 (photo);