This series contains correspondence and legal documents relating to Alfred's relationship with his three wives and his children. His detailed correspondence with his adopted daughter Alicia through her childhood and early married years in Europe present an especially detailed picture of the lifestyle and spending habits of an extremely wealthy family. Alfred also carried on a lifelong correspondence with his daughter Madeleine who settled in Munich, Germany. Letters exchanged with his brother Maurice document the rise and fall of the powder business, other business activities, and numerous social events. Alfred's especially candid letters with his older sister Marguerite, whom it is said, was the only person he feared, reveal his most intimate thoughts and activities.