Abraham and Mary (nicknamed; Molly) were married in Springfeild, Illinois at the home of her sister. Four sons were born of the union. Robert, Edward, William, and Thomas (Tad). Edward died at the age of 31/2, William died at age 11, and when Tad died at the age of 18 in 1871 it threw Mary over the brink into insanity. After a brief stint in a mental institution she lived with her sister Elizabeth in Springfield, Iliinois. Mary Todd Lincoln died there at the age of 63 in 1882.