Marion LaFollette

Marion died as a small child.

From (probably) a book about the La Follettes:

The funeral services for Josiah La Follette were very simple, just a prayer by his neighbor and good friend Deacon David Thomas, and some hymns. They were too far away to get a minister. When the little brother Marion died, he had been buried on a hillside of the farm in sight of the house. The mother wanted the child buried with his father. The boy's coffin was taken from the grave, which had been carefully boarded up, and brought to the house and opened. The child's face was perfect as if asleep. While they were looking, it fell to ashes. Father and son were taken to the Postville cemetery on Green's prairie and placed together in one grave.

In 1894, after his mother's death, it was decided to move the father's (& Marion's) remains to Madison for burial beside her. Bob consulted his friend, Dr. Cornelius Harper, as to the necessary preparations and with his brother, William drove to Postville on this mission. When the gravedigger got down to where the coffin had been, they found it had disappeared; but the outlines could be traced in the surrounding clay. Bob himself carefully removed the relics of his father's skeleton. Dr. Harper, who assisted at the reburial in Madison, says that before the coffin was finally closed Bob studied the relics carefully. He commented on the prominent forehead, the small hands and feet. They talked for more than an hour. Bob asked many questions and seemed intent on reproducing in imagination the form of his father as he looked in life.