Answer:
The author's purpose of including information that the survivor's were transformed into medicine men is to show how the Lord was working in their favor in the Island.
Explanation:
Cabeza de Vaca was a Spanish explorer and one of the four survivors in the present day Texas, New Mexico, and Arizona states. When de Vaca and other survivors were held captive by Karankawa Indians, they forced the survivors to become the medicine men.
It took two years of captivity for Karankawa Indians to trust de Vaca. When de Vaca includes this information in his journal on the survivors' transformation into medicine men, his purpose is to educate his audience of how the Lord helped them and worked in their favor. When the survivors' prayed for the sick they immediately received healing in their body.
