Abstract The papers in the John McHenry Family Papers, spans 183 years, from 1764 to 1947. The materials consist of two letters from Dr. James McHenry (1753-1816), one to General Washington and the other to William Tilghman; numerous letters from Margaret Caldwell, sister-in-law of Mrs. James McHenry (also Margaret Caldwell); one real estate book of James Howard McHenry (1820-1888); and business records of John McHenry (c.1865-1939), regarding family property and Mercantile Trust Co. affairs. The...