Professional gambler who learns the trade from Kansas John. Travels to New Orleans, becomes entangled with the Dureau family, builds a casino, survives a duel with Laurent, loses his fortune after George Elwood's betrayal, and ultimately returns to gambling with Angelique.
Mark harbors early romantic interest in Angelique, which she initially rejects.
Caldwell serves as a primary external threat, attempting to eliminate Mark through violence.
George's betrayal directly causes Mark's financial downfall, creating a bitter rivalry.
The two men share a mutual appreciation for swordsmanship, bridging their social divide.
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