24 Hours Marston is a comic by Eric "Kafka" Feurstein, depicting the kind of things Red Dead hero John Marston gets up to in a day on the frontier.
It's a fairly hit-and-miss comic, but when it hits - normally when truly nailing some of the game's lovable absurdities - it hits. You can find the full 24 hours below, and while you're there, his 24 Hour Batman is just as good, especially with its Game Boy cameos.
[24 Hours Marston, thanks Pete!]