In the Clutter Report overview of The Merry Adventures Of Robin Hood a commentor explained why the author’s art was replaced by a high school artist. It was what I expected, and while I preferred the author’s art because it was the author Laura Winter’s art wasn’t too bad. The commentor also pointed me to this article that goes over the history of the Student Classics and the student artists who illustrated them. Apparently there isn’t much information out there about them.
Sadly I still don’t know why that one section was removed and I had to look it up online.