Step 1 : Introduction to the question "Abe Lincoln's son was pulled to safety from an oncoming train by whose brother?"
"Willie" Lincoln was born on December 21, 1850, and died of a fever on February 20, 1862. The Lincolns' fourth son, Thomas "Tad" Lincoln, was born on April 4, 1853, and died of heart failure at the age of 18 on July 16, 1871. Robert was the only child to live to adulthood and have children.
