So, i did this sketch immediately after the first one. It looked much better. I had no idea how to arrange the body on the table and if the feet were still in the picture.
The two heads on the left are still not in the correct line. The other heads are in a better shape. Then I noted two things: The dead body is completely on the picture. Although I am not sure, the proportions and the body length seem a little short. Maybe they are studying a dead body of a person with dwarfish body proportions (there is a name for that). And there is a book on the right lower corner of the picture that everybody stares in. How could I miss that?