In 1811-12 Marie Dorion, an Iowa Indian woman, travelled 3,500 miles west, from St. Louis to Oregon, with her two young boys and her husband, who was an interpreter for white explorers.
In Oregon her family joined a bear-hunting expedition, and a local band of Indians attacked them.
Only she and her two sons survived. She then set out for the nearest white settlement, more than 100 miles away.
It was winter and a snowstorm soon forced her to stop. She and her children spent almost two cold months in a makeshift shelter of branches and snow.
They had to eat their horse, but they survived.