Boy! You should a seen that darky’s face! It just shone.
When the author refers to, "that darky's", face it must be referring to the color of that persons skin color. When the author uses that phrase it makes me think that the author is trying to sound some what racist and that I feel like we as readers are able to pick something like that makes me think that this phrase is a strong one that points out the writers obvious message that she wants people to know that person was a dark skinned person.