Beginning at the centre of the top with a strongly accented note of contrast, the dark tone of the mass of trees gradates into the ground and on past the lower right-hand corner across the front of the picture, until, when nearing the lower left-hand corner, it reverses the process and from dark to light begins gradating light to dark, ending somewhat sharply against the sky in the rock form to the left.
"The Practice and Science Of Drawing"
Harold Speed