JONAH HEX

classic cowboy fish-out-of-timewater story

walks out of desert and into town, meets bar owner who agrees to shelter him in return for some favours
favours start with intimidating bar owner's ex husband who's gunning for ownership of bar (presumably so he can sell it)

Ex-Husband works on an oilfield in the nearby desert
Oilfield owner is great-great-grandson of Quentin Turnbull
He wants the deed of the bar, not for the bar, but for the LAND the bar is on - Quentin put his treasure there years and years ago after finally killing Jonah