Edgar Allen Poe
Poe was found wandering the streets of Baltimore on October 3rd, 1849. He was brought to a hospital, where he died four days later on the 7th. He was never lucid enough to tell anyone what had happened to him. Even the cause of his death isn’t known for sure.
The last reliable sighting of Poe before October 3rd was on September 27th, when he left his home to go to New York. I recommend reading the Wikipedia article, it is truly interesting.
Story Credit: Reddit/AndreOfAstora