GW lost 3s. 6d. in playing cards with his friends (General Ledger A description begins General Ledger A, 1750–1772. Library of Congress, George Washington Papers, Series 5, Financial Papers. description ends , folio 269).
“[Diary entry: 16 January 1768],” Founders Online, National Archives, https://founders.archives.gov/documents/Washington/01-02-02-0003-0001-0016. [Original source: The Diaries of George Washington, vol. 2, 14 January 1766 – 31 December 1770, ed. Donald Jackson. Charlottesville: University Press of Virginia, 1976, p. 32.]