A few two-page spreads of the small sketchbook I am using while teaching a short-term course on drawing on location at the UW. Quick sketches, freely drawn, to illustrate selecting viewpoints, outlining process, roughing out structure, gauging proportion, and establishing scale.
Almost all drawing is memory drawing—drawing from memory. Even when drawing on location, as soon as we turn our gaze from the subject of our drawing to the page, we rely on our visual memory of what we have seen to be able to project this image onto the page and to draw it. Nurturing this ability to see, scan, visualize, project, and draw takes time and practice. But once we are comfortable with the process, drawing from observation will become that much more fluid.