To discover the best arrangement, and to get the utmost experience in line
and space composition, the landscape should be set into several boundaries
of differing proportions, as in Chapter V, and as shown in the examples,
keeping the essential lines of the subject, but varying them to fit the
boundary. For instance, a tree may be made taller in a high vertical space
than in a low horizontal space, (No. 37 below). After working out this
exercise the pupil may draw a landscape from nature and treat it in the
same way. Let him rigorously exclude detail, drawing only the outlines of
objects.