In the novel "The Island of the Blue Dolphin" the historical events were fairly true to the actual events. The Aleuts and the Russians had gone to the island and hunted otters for their pelts. They had fought with the Indians and harmed many of them. The Indians were removed from the island for their safety. A woman did return to the island and was left there for many years.
The woman's child was on the island, not her brother. Her child was killed by wild dogs. The woman was eventually rescued by white men. The woman was wearing a skirt made out of cormorant skins and feathers.