Jared Sparks (1789-1866), was a noted writer and historian. Sparks’ herculean historical productions included not only the writings of George Washington (12 volumes) but also Benjamin Franklin (10 volumes) and Constitution signer Gouverneur Morris (3 volumes). Additionally, Sparks compiled the Library of American Biography (25 volumes), The Diplomatic Correspondence of the American Revolution (12 volumes), and the Correspondence of the American Revolution (4 volumes). In all, Sparks was responsible for some 100 historical volumes. Additionally, Sparks was America’s first professor of history–other than ecclesiastical history–to teach at the college level in the United States, and he was later chosen president of Harvard.
In his research regarding George Washington's faith he reached out to Washington's adopted daughter, Nelly Parke Custis.
When Martha [Custis] married George Washington, she was a widow and brought two young children (John and Martha–also called Patsy) from her first marriage into her marriage with George. The two were carefully raised by George and Martha, later married, and each had children of their own. Unfortunately, tragedy struck, and both John and Patsy died early (by 1781). John left behind his widow and four young children ranging in age from infancy to six years old.
At the time, Washington was still deeply involved in guiding the American Revolution and tried unsuccessfully to convince Martha’s brother to raise the children. The young widow of John was unable to raise all four, so George and Martha adopted the two younger children: Nelly Parke Custis and George Washington Parke Custis, both of whom already were living at Mount Vernon.
Nelly lived with the Washingtons for twenty years, from the time of her birth in 1779 until 1799, the year of her marriage and of George Washington’s untimely death. She called George and Martha her “beloved parents whom I loved with so much devotion, to whose unceasing tenderness I was indebted for every good I possessed.”