Documents in this series concern business outside of Treuhaft's law firm. Most are between Treufhaft and his correspondents, but there are also occasional letters to or from Jessica Mitford. Many of these concern literary matters, including Treuhaft's and Mitford's letters to and from Robert Gottlieb, their editor at Knopf, about The American Way of Death Revisited, editors of letters of Mitford's published letters, and with potential and actual biographers of Mitford. Because Treuhaft and Mitford often had, or developed close relationships with business correspondents (they were often friends or became friends) a considerable amount of the correspondence mixes both personal and business matters.