Mary Elizabeth Rollins Lightner wrote in a letter to Emmeline B. Wells
"He [Joseph Smith Jr.] was commanded to take me for a wife," and ""I could tell you why I stayed with Mr. Lightner. Things the leaders of the Church does not know anything about. I did just as Joseph told me to do, as he knew what troubles I would have to contend with.""
[Exploring Mormonism: Polygamy Timeline, http://www.exploringmormonism.com/polygamy-timeline/]