William Nichols (1754–1804)
William Nichols was born on 28 November 1754 in Enniskillen, County Fermanagh, Ireland. Following service as an officer in two Pennsylvania regiments during the Revolutionary War, he worked as a notary, attorney, and court clerk in Philadelphia. Nichols concluded his public career as U.S. marshal for the District of Pennsylvania from 1795 to 1799. He died in Philadelphia on 19 October 1804, survived by his wife Margarete Hillegas (1760–1808, m. 1792) and two of their children.
"To George Washington from William Nichols, 28 July 1790," Founders Online, National Archives, https://founders.archives.gov/documents/Washington/05-06-02-0061. [Original source: The Papers of George Washington, Presidential Series, vol. 6, 1 July 1790 – 30 November 1790, ed. Mark A. Mastromarino. Charlottesville: University Press of Virginia, 1996, pp. 132–133.]
"From John Adams to United States Senate, 4 December 1799," Founders Online, National Archives, https://founders.archives.gov/documents/Adams/99-02-02-4064.
Gazette of the United States (Philadelphia), 14 April 1795 (America’s Historical Newspapers).
State-by-State Chronological Listing of United States Marshals at U.S. Marshals Service.
William Nichols at Find a Grave.
William Nichols at FamilySearch.