http://www.wivesofj osephsmith.org/

Excellent site. Very few members of the church know that Joseph Smith had multiple wives. Even fewer knew that he kept them secret from his first wife, Emma. When Joseph first mentioned polygamy to Emma she told him that if he was to marry more than one woman then she would marry more than one man, which is why he put in the revelation that a woman cannot marry more than one man but a man could marry more than one woman.