The political wife Harriet Lane died at the age of 73. Here is all you want to know, and more!
Biography - A Short Wiki
Niece of lifelong bachelor and President of the United States James Buchanan who acted as First Lady from 1857 to 1861. She was known for the large collection of European art that she had acquired over the years and donated to the government after her death.
She was thirty-six years old when she married Henry Elliott Johnston, a Baltimore banker.