No gambler ever uses any real honor.
Men of honor work for the money that they need or want.

Duff had a smooth way of talking, an agreeable manner with his profitable victims, but he never had a shred of honor.

It isn't possible to be a gambler and a man of honor.

If you've seven hundred dollars that you lost to Duff at cards, put it in your pocket and get out of Paloma as soon as you can.
Duff won't need the money, anyway.

He's down at the Mansion House, dying of a bullet wound that he got through his last piece of trickery.