Drawing made easy : a helpful book for young artists; the way to begin and finish your sketches, clearly shown step by step (1921)
Lutz, Edwin George, b. 1868 · New York : C. Scribner's Sons · leaf 71
You will notice in these engravings that parallel dotted lines areindicated running across the diagrams. They are not intendedto be drawn by you just this way, but are only to remind youof the right proportions in which to draw these pictures. Ofcourse, if it will help you in your work, you may…
Drawing
Internet Archive · Boston Public Library · Public Domain Mark 1.0. Free to use for anything.