Brigham Young marries Eliza Ann Web age 24. Author of Wife no. 19, she is actually wife no. 52. She was previously married to John D. Lee, who was executed Mar 23, 1867, or about one year earlier, for his involvement with the Mountain Meadows Massacre. Lee was Brigham's bodyguard throughout the Nauvoo period.
[Source: Exploring Mormonism: Polygamy Timeline, http://www.exploringmormonism.com/polygamy-timeline/]