Duke and King

Duke and King are two people that are sitting on the bank of the river and Huck and Jim pick them up. I think it is very easy to see that they are not really a duke and a king and that Huck and Jim are wise to be cautious around them. I do not think that it means that they cannot be trusted completely because Jim and Huck are not so right with the law anyway so it would not be harmful for them to be abiding fugitives or anything like that.