I recently queried about a note I found in "Heretical Fictions" on his 
apparent sympathy for "Indians" in his later decades.  I received a 
reference to a  masters Thesis from 1984 that argues he never actually 
hated Indians, he was only using them as a rhetorical device to 
criticize Western Civilization.  My opinion is that the vehemence of his 
comments belie this idea.  I posted a short essay on this on my personal 
website for those interested. https://bscottholmes.com/node/1909

/Unaffiliated Geographer and Twain aficionado/