The American writer Ambrose Bierce, whose most famous work is probably the short story ‘An Occurrence at Owl Creek Bridge‘ (‘An Inhabitant of Carcosa‘ also rules), mysteriously disappeared while traveling in 1914 when he was about 72 years old. In one of his last letters, which he wrote from the road, he said this:

Good-bye. If you hear of my being stood up against a Mexican stone wall and shot to rags, please know that I think it is a pretty good way to depart this life. It beats old age, disease, or falling down the cellar stairs. To be a Gringo in Mexico—ah, that is euthanasia!

I love it. I have many times written similar such things in letters to friends (lol)~