Freehand perspective and sketching; principles and methods of expression in the pictorial representation of common objects, interiors, buildings and landscapes (1910)
Norton, Dora Miriam · Brooklyn : D. M. Norton · leaf 118
g. 165) must be marked,and through it a vertical line (EF) and ahorizontal one (GH, vanishing in VP2)drawn. The real centers of the quatrefoilcircles fall each on one or the other ofthese lines. Their long diameters (a littlein front of these real centers) are parallel with the other long diameters… … A. TRONT VIEW
Drawing
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