![](https://www.frankching.com/wordpress/wp-content/uploads/2021/09/ADrawingLesson.jpg)
From a Rome journal, two pages of sketches drawn during a teaching session. The first page contains explanatory sketches accompanied by bits of concise text: “Pay attention to profiles”…“Suggest details within shadows”…“Visualize shape of curves.”
![](https://www.frankching.com/wordpress/wp-content/uploads/2021/09/ADrawingLesson2.jpg)
The second page illustrates how to estimate proportional heights above and below an imagined horizon line.