Whittock, Nathaniel: The Oxford Drawing Book, Or The Art Of Drawing, And The Theory And Practice Of Perspective: In A Series Of Letters Containing Progressive Information On Sketching, Drawing, And Colouring Landscape Scenery, Animals, And The Human Figure: With A New Method Of Practical Perspective: Detailed In A Novel, Easy, And Perspicuous Style, For The Use Of Teachers, Or For Self-Instruction. Embellished With Upwards Of One Hundred And Fifty Lithographic Drawings, From Real Views, Taken Expressly For This Work (Oxford , London, 1825)

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LETTER VII.
Plate XXXI.—-No. I. is a study of one of the most graceful trees in nature, the
drooping willow. With respect to the mode of copying this, little verbal direction can
be added to that given in my last letter : care must be taken in sketching all the
masses first with a light pencil. If the outlines are not quite correct in the first in-
stance, repeat the attempt, without rubbing out those first made, as they will all
blend together when you proceed to put the tree in light and shade. You will ob-
serve there is not a great deal of strong light inside of the branches on which the
light falls; it is in middle tint, which you will produce by passing the pencil lightly
over every part of the tree, except where the strong light is required: over this, you
can put in the lines of the second shade, where it may be required. I have drawn
the tree in this state, as an example for all future drawings, where trees of this kind
are introduced.
No. 2. is the tree finished; and if you look at No. 3. you will see the sort of lines