I ran across a page from Leonardo's notebooks the other day, in Drawing Lessons from the Great Masters. It was absolutely covered in drawings, colliding into one another. It reminded me of "scratch paper" from student homework. And clearly, it was. It was Leonardo working out all sorts of ideas and practicing mark making.
I was rather humbled by that. Do I have any pages like that in my sketchbooks?
So I filled up a page with copies of his homework.
The above eyes were very small in my reproduction, maybe a inch in total size. I wanted to see if I could just follow the dark shapes at a larger size and get the same moody result. My drawing is more like 5 inches across.