"They’ve a secret commerce. Some terrible covenant. You mind. You’ll see I’m right"
Faust's pact with Mephisto, engraving after Goethe's Faust (c. 1840)
Public DomainFaust's pact with Mephisto, engraving after Goethe's Faust (c. 1840) - Credit: Julius Nisle

This is the first suggestion of a Faustian pact between Judge Holden (who may be the Devil) and Glanton (and, by extension, the Glanton Gang as a whole).

Further evidence of some sort of Satanic contract can be see in Holden’s extensive use of legalese and, by the end of the novel, the collective fate of the gang members who once rode with the Judge.