I noticed a little something

So you guys know in Chapter 17 when Huck gets taken in by the family? Well, I found a quote (it's on page 111 in my book, but I think mine's different than most people's) where he says "Buck and his ma and all of them smoked cob pipes, except the nigger woman, which was gone, and the two young women." I feel like there's some significance to Huck referring to the "nigger woman" as "which" rather than "who". It's just a little detail, but I feel like it really shows how slaves were regarded as objects back then and how Huck himself, even though he's helping Jim run away, has still had that attitude engrained in him by society.