Original: Eliza McCardle Johnson ( October 4 , 1810 -- January 15 , 1876 ) was the 21st First Lady of the United States and the wife of Andrew Johnson , the 17th President of the United States .
Simplified: Eliza McCardle Johnson ( October 4 , 1810 - January 15 , 1876 ) was the wife of Andrew Johnson , the 17th President of the United States .