Gunman's Reckoning by Max Brand

If the meeting between Lord Nick and Donnegan earlier that day had wrought up the nerves of The Corner to the point of hysteria; if the singular end of that meeting had piled mystery upon excitement; if the appearance of Donnegan, sitting calmly at the table of the girl who was known to be engaged to Nick, had further stimulated public curiosity, the appearance of Lord Nick was now a crowning burden under which The Corner staggered.

Yet not a man or a woman stirred from his chair, for everyone knew that if the long-delayed battle between these two gunfighters was at length to take place, neither bullet was apt to fly astray.