[6] While in Washington, they lived in the former home of James G. Blaine on Dupont Circle for several years before moving into the palatial Leiter House.

[9] Also that year, it was announced that she was chosen by Governor John Riley Tanner to christen the battleship USS Illinois.

[16] Together, they were the parents of:[16][17] While she was in India with her sister, her husband died after shrapnel pierced his heart at the Battle of Istabulat on 21 April 1917 while commanding his battery.

[23] Upon her father's death in 1904,[24] he bequeathed her millions of dollars in his will, which stipulated that she had to live four months of every year in the United States.

[25][26] In 1930, she agreed to sell the Pelican Portrait of Queen Elizabeth I, which was at Charlton House, to Spink & Son for a rich collector.

[27] In 1934, she bought property on Magee Road at the foothills of the Santa Catalina Mountains in Oro Valley, Arizona from Matthew Baird III.

[29] During the 2014-2015 exhibition at London's National Portrait Gallery, Margaret was featured among the high-profile American heiresses to marry into British aristocracy.