<span>Based on the given excerpt related to this question, the purpose of Sancho's writing is to convince Sterne to write more texts against slavery. This is based on the excerpt from Letters of the Late Ignatius Sancho, an African who wants to tell the public about the pain and mistreatment in slavery.</span>
The Way to Rainy Mountain is a book by N. Scott Momaday about the travels of the Kiowa tribe from Montana to Fort Sill. He tells the story through three different points of view that help understand the history of his people and how he rediscovered it.
So the answer is <em> To provide material evidence of the traditions of the Kiowa through a written account of their history</em>.
Not a big deal, but purely depends on the thoughts/mindset of a person. Just write down what you see. like after reaching the dinner His Lordship Macbeth was under spell, which cause made the things visible to him that can't be viewed by others