Through my studies of Albert Gallatin, life long close friend of my ggggg grandfather John Badollet, I was able to purchase an out of print copy of Gallatin's son, James' diary. In this diary, mostly focused in the period of 1813-1827, we get a wonderful glimpse into how vital Gallatin was in American history, his European connections, with Voltaire (his grandmother had a close relationship with him), Napoleon (who tried to get Gallatin to give him inside US information, which Gallatin refused), and Jacques David (famed French painter of Napoleon's coronation), and others. Gallatin was negotiating the Treaty of Ghent at the early part of this diary (where James, his son, was his personal secretary).
Jacques David had asked Gallatin if his son, James at age 16, would pose for a nude portrait "Cupid & Psyche" with a young woman. This famous portrait is in the Cleveland Museum of Art, with few knowing the history of the portrait. James was asked to pose for this painting March 3, 1815.