Robert Todd Lincoln (August 1, 1843 - July 26, 1926) was the first son of Abraham Lincoln and Mary Ann Todd. Born in Springfield, Illinois, United States, he was the only one of President Lincoln's four sons to die in old age. Wikipedia
...1887 Abraham Lincolns son, Robert Todd Lincoln, helps Oscar Dudley open the Illinois Industrial Training School for Boys in Norwood Park after Dudley, an agent for the Illinois Humane Society... www.glenwoodschool.org/history.htm
The definitive Wikipedia entry for Robert Todd Lincoln. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Robert_Todd_Lincoln
The Earliest Known Photograph of Abraham Lincoln --- Young Abraham Almost Died When He Was Kicked by a Horse Incident at Knob Creek: Young Abraham Almost Drowned Ann Rutledge - Abraham Lincoln's First Romance? home.att.net/~rjnorton/Lincoln66.html
The Artist Daniel Huntington (18161906) painted President Abraham Lincoln as well as his son, Secretary of War Robert Todd Lincoln. www.army.mil/cmh-pg/books/sw-sa/Lincoln.htm