Denis John-Naylor creates wonderful drawings of trees and their leaves and seeds. Here he describes the techniques he uses, such as shaping the pencil end to make the right mark, building up a pattern of lights and darks, sketching in pencil or ballpoint pen, measuring angles and proportions, impressing grooves and lifting out tone with a putty eraser. Four demonstrations show how to use these techniques to create tree drawings, from a detailed study of oak leaves to a huge sequoia.