Also John Coffee mentions her on his little adventure to help out the wardens wife.
I noted that too, when I rewatched
The Green Mile some time ago.
That scene (and the whole sequence) was a memorable part of the movie: once the prison guards realize and understand John Coffey's (brilliantly played by Michael Clarke Duncan) gift of healing people, they "smuggle" him to cure the prison warden's wife of her terminal brain cancer. When he gets outside of the prison for the first time, and is under the night sky filled with stars, he stares at them in wonder and says to the senior guard (Tom Hanks), "Look, boss. It's Cassie, the lady in the rocking chair." (The constellation resembles a chair, and according to Greek mythology, Cassiopeia ended up sitting chained on her throne/chair in the heavens.)
As a movie, it's an awesome though heartbreaking one. I have seen it a couple of times to date, and on every occasion you can't avoid getting emotional and teary eyed.
(An aside, I guess sometimes watching movies/tv-series could help to process mental "blockages" that haven't been resolved yet. I remember watching the tv-series adaptation of Charles Dickens'
"Bleak House" years ago, and by the final episode, where all types of plights the characters had experienced were worked out and there was a happy ending, I had a pretty strong emotional release. A certain issue had been building up in my mind for a while, and the "dam" broke at that time.)
The fate of John Coffey is such a tragic gut punch; on one hand you would want him to go free and continue his good work, but on the other, you can see the predicament from his point of view. He is tired of it all, and overwhelmed by the bad things people experience and do to each other, which is magnified through his gift and pureness (he is intellectually disabled in some ways). Also, there's no way to prove his innocence of the crime he supposedly committed, and if he were let out by the guards who know the truth, the likely outcome would be him being chased and lynched.
Kudos has to be given to the director and screenwriter Frank Darabont; he's responsible for adapting The Green Mile and The Shawshank Redemption, and they both are classics. (I read an interview of him back when The Green Mile was released, where he quipped that he's operating in the world's smallest sub-genre, adapting Stephen King prison novels into movies!)