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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In drawing an elevation of a building, you are supposed to stand directly in front
of it; all the lines are of equal length and breadth: nor can you see either of the
sides. You will understand this by looking at No. 1. Plate VIII. which is an ele-
vation ; but if you could go towards the end of the house, you would see the front and
one side; in this case all the lines would not be of an equal height, those nearest the
eye being higher than those at a distance, which decrease in length as they recede from
the view. In the drawing No. 2. the same building is in perspective. Having given
you this idea of the difference between elevation and perspective, I shall in my next
enter more fully on the latter.

N. WH1TTOCK.