Thanks to Isis for this one:
Unfortunately, I do not have the original copy with teacher comments. However, he showed it to me after he got his "bullshit" grade of 50%. It said, "Very interesting, but the assignment was to read a novel, that's why we had reading time in class." This was a term-long project. Even better, he had already read this book for another class: we were doing a translation in Latin.
When the composition is almost as long as the book itself, then you have to give the student an A!*
*really you do, check the rules on marking a composition! I'm pretty sure it's in there... what do you mean 'there's no such thing as composition marking rules'?