Born: 1772-10-01 Philadelphia, Pennsylvania
Died: 1850-07-16 Washington, D.C.
President George Washington appointed Hagner as a clerk in the Treasury Department in 1793, and by 1797, he was an assistant accountant in the War Department. Hagner married Frances Randall. In 1817, President James Monroe appointed him Third Auditor, a position he held until 1849. When Hagner died in 1850 at the age of seventy-eight, he was lauded for his long and stellar government service.
Gravestone, Saint Anne's Cemetery, Anapolis, MD; James Grant Wilson and John Fiske, eds., "Hagner, Peter," Appletons' Cyclopaedia of American Biography, (New York: D. Appleton, 1887-1889), 3:25.