The Rangeland Avenger by Max Brand

Now that sound had entered the jail, and it had a peculiar effect. It was like that distant murmuring of the storm which walks over the treetops far away. It made the sheriff and his two prisoners lift their heads and look at one another in silence, for the sheriff was most unprofessionally tilted back in a chair, with his feet braced against the bars of the cell, while he chatted with his bad men about men, women, and events. The sheriff had a distinct curiosity to learn how Arizona had recovered so suddenly from his "blue funk."

Unquestionably the fat man had recovered. His voice was as steady now as any man's, and the old, insolent glitter was in his eyes. He squared his shoulders and blew his smoke straight at the face of the sheriff, as he talked. What caused it, the sheriff could not tell, this rehabilitation of a fighting man, but he connected the influence of Sinclair with the change.