Henry Kerr, son of Philip Gerhart and Elizabeth (Kerr) Hartzell, was born in Rockhill township, Bucks County, Pennsylvania, May 6, 1839, and died Dec. 20, 1911. For a short time he studied in the medical department of the Jefferson College in Philadelphia, then pursued his studies in the University of Vermont, from which he was graduated in 1863 with the degree of Doctor of Medicine. For seven years he practiced his profession in Guthsville, Pennsylvania, then removed to Allentown, Lehigh county, in 1870, where he was in the banking business seven years. Mining operations then claimed his attention, and he was one of the organizers of the Lehigh Valley Trust and Safe Deposit Company, and a director in it. He was a member of the Reformed Church, an independent Democrat and a thirty-second degree Mason. Mr. Hartzell married Mary A., a daughter of Dr. Tilghman H and Mary A (Kramer) Martin, granddaughter of Dr. Jacob and Jane Martin, and great-granddaughter of Dr. Christian Frederick Martin, who was born in Prussia, Dec. 22, 1727, came to America and settled at Trappe, Montgomery county, Pennsylvania. They had children: Helen M., and Henry Kerr, Jr. He died Dec. 20, 1911.