Gunman's Reckoning by Max Brand

The bar in Milligan's was not nearly so pretentious an affair as the bar in Lebrun's, but it was of a far higher class. Milligan had even managed to bring in a few bottles of wine, and he had dispensed cheap claret at two dollars a glass when the miners wished to celebrate a rare occasion. There were complaints, not of the taste, but of the lack of strength. So Milligan fortified his liquor with pure alcohol and after that the claret went like a sweet song in The Corner. Among other things, he sold mint juleps; and it was the memory of the big sign proclaiming this fact that furnished Donnegan with his idea.

He had George Washington Green put on his town clothes -- a riding suit in which Godwin had had him dress for the sake of formal occasions. Resplendent in black boots, yellow riding breeches, and blue silk shirt, the big man came before Donnegan for instructions.