I found a sketchbook of mine with mostly undated sketches. I do know that I used this book between 2009 and 2012. I remember trying to draw every leaf, at this point in my sketching practice. I also concentrated on getting proportions correct. I found that, in attempting to draw every leaf, several things would happen: I would lose track of which leaf I was on, sometimes re-drawing the same leaf in a different position; lighting would change, as the painstaking process of drawing leaf outlines would take a long time.