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The original postcard titled End of the Trail (1953) by Adrian Atwater depicts the dead cowboy Wallace Irving Robertson.
(lemmy.world)
This postcard was sold in a museum I often visited as a kid. I always stopped by the gift shop on the way out to look at it. I revisited the gift shop as an adult and bought myself a copy.
(Not me holding the postcard)
Looks like the Clash also used it for an album cover.
