In 1981, wildlife photographer Carl McCunn paid a bush pilot to drop him near the Coleen River in northern Alaska. He thought he’d arranged for the pilot to pick him up again.

He hadn’t.

State troopers found his body the following year. He had tried to winterize his tent, then shot himself in the head. A 100-page diary read, “I think I should have used more foresight about arranging my departure.”