The American Inferno, Burnt Out

The American Inferno, Burnt Out is a stranger mission in red dead redemption 2

Story
John meets a man atop a mountain side writing a draft for a new book, and the two have a conversation and he reveals that he is Evelyn Miller, one of Dutch's personal heroes.

He then tells John to meet him at his cabin near Tanner's Reach. When John later goes to his cabin, Miller takes him to find a group of hunters who have been killing animals for sport. He antagonizes the group before being punched in the face. After dealing with the hunters, he thanks John.

As John shows up again, he locked himself in his cabin and states he won't eat, drink, or leave until his draft is complete.

Although John leaves food at his cabin after sometime, however the third time John returns he smells an awful stench. He breaks into the cabin to find the corpse of a deceased Miller. After taking his book, John reads Evelyn's last request, stating he wants to be burned to be with "the Eagles". John proceeds to fulfill his request and burns Evelyn's cabin with his corpse inside.

Trivia

 * this is the only stranger side mission that Arthur cannot do.