George and Barbara Bush never stopped agonizing over the death of their 3-year-old, Robin
In a letter penned to his mother in the late 1950s, George H.W. Bush indicated that something was missing from his home.
At the time, Bush and his wife, Barbara, were parents to four rambunctious young boys - George W., Jeb, Marvin and Neal - whom they loved dearly. But, he wrote, there was something he still longed for.
Something he once had.
"The running, pulsating restlessness of the four boys as they struggle to learn and grow - needs a counterpart," he wrote. "We need some...