Tad Lincoln lived to the age of 18 years old. Mary was still alive, when she had to witness the death of her 3rd child. It is thought that he died of tuberculosis. Only Robert survived. To see photos and find out more about his life, go to: http://home.att.net/~rjnorton/Lincoln69.html
Robert Todd Lincoln is NOT buried in the tomb with his family. He died in 1926 at the age of 83. His wife had him buried at Arlington National Cemetery. The reason for this was located in a letter written by his wife where she stated that Robert... "was a personage, made his own history, independently (underlined 5 times) of his great father, and should have his own place 'in the sun'!" For more about Robert's life, go to: http://home.att.net/~rjnorton/Lincoln66.html