The Rangeland Avenger by Max Brand

With a bang the screen door of Sheriff Kern's office had creaked open and shut four times at intervals, and each man, entering in turn with a "Howdy" to the sheriff, had stamped the dust out of the wrinkles of his riding boots, hitched up his trousers carefully, and slumped into a chair. Not until the last of his handpicked posse had taken his place did the sheriff begin his speech.

"Gents," he said, "how long have I been a sheriff?"