At the time of her marriage to the Duke of Roxburghe, she was the wealthiest American heiress, with a dowry of twenty million dollars, exceeded only by Consuelo Vanderbilt in the wealth brought to the transatlantic marriages of the pre-1914 era (see Gilded Age). In 1913, she first became a guest of Queen Mary and King George at Windsor Castle. She and the Duke were also the guests of King Edward VII and Queen Alexandra. In 1929, she inherited $3,000,000 from her mother's estate after the death of her mother, as well as the Goelet art collection.