Perspective, or, The art of drawing what one sees : explained and adapted to the use of those sketching from nature (1872)
Collins, W. H. (William Henry) · London : Longmans, Green · leaf 30
12 PERSPECTIVE DRAWING. througli the glass, as in fig. 2, not oblique as in fig. 3. Fig. 3. … This plane of the picture will in the following treatise be supposed to be always vertical and held as here described direct across the line of sight. ^ Perspective ’ embraces all positions of this plane, oblique as well as not vertical, but the require¬ ments of painting limit us to the above…
Perspective · Drawing
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
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