I think that this excerpt from chapter 23 of The Adventures of Huckleberry Finn most clearly illustrates that the duke is someone who does not take responsibility for his actions and would rather blame others if something does not go well:
…Well, when the place couldn't hold no more people the duke he give a fellow a quarter and told him to tend door for him a minute, and then he started around for the stage door, I after him; but the minute we turned the corner and was in the dark he says:
«Walk fast now till you get away from the houses, and then shin for the raft like the dickens was after you!»….