Original: Mary Ann Todd Lincoln ( December 13 , 1818 -- July 16 , 1882 ) was the wife of the 16th President of the United States , Abraham Lincoln , and was First Lady of the United States from 1861 to 1865 .
Simplified: Mary Ann Todd Lincoln ( December 13 , 1818 - July 16 , 1882 ) was the wife of Abraham Lincoln , the sixteenth President of the United States .