First, a sense of the supernatural infests the ominous swamp that Tom Walker is not afraid to cross (though others are) on the way home. He behaves as if he is oblivious to its dangers, and seemingly ignores supernatural associations with the swamp that others repeat and take for truth:
...stories handed down from the times of the Indian wars, when it was asserted that the savages held incantations here and made sacrifices to the Evil Spirit.
The treacherous nature of the swamp might have reminded some readers of Jonathan Edwards' sermon "Sinners in the Hands of an Angry God." Edwards also describes a treacherous landscape that the foolish hop about on with no realization of how close they are to eternal hellfire.
Not surprisingly, it is in this unsettling place that Tom meets the devil himself. The devil comes disguised as a man, but he has "a pair of great red eyes." Further, he associates himself with the Indians who made sacrifices to the Evil Spirit, stating:
I am he to whom the red men consecrated this spot, and in honor of whom they now and then roasted a white man, by way of sweet-smelling sacrifice.
He also says he is the patron of the slave traders and the "grand master" of the witches.
Another supernatural element is the local Christian church, which Tom joins in an attempt to wriggle out of his bargain with the devil. Comically,
He became, therefore, all of a sudden, a violent church-goer. He prayed loudly and strenuously, as if heaven were to be taken by force of lungs...
The hardened Tom believes fully in the supernatural at this point in the story, both in the devil and in the church. Finally, there is implicit evidence of the supernatural at work in the fate of Tom Walker's money and goods:
In place of gold and silver, his iron chest was filled with chips and shavings; two skeletons lay in his stable instead of his half-starved horses.