First western to use "fuck"?

Reading a western from 1956, The Authentic Death of Hendry Jones by Charles Neider, and one character says "fuck you" to another.

This seems pretty early to me.

Does anyone know when the first F-bomb was used in a western? Could this be a contender?

The Authentic Death of Hendry Jones was filmed as One-Eyed Jacks in 1961 (starring Marlon Brando), was also published under the title Guns Up, Was last reissued was 1993, and is currently out of print.