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 93
ement and the lines on the wall confronting us, will be all parallel to the bottom margin of the picture. They will have no vanishing point. If the oblique view should be taken as that given in the sketch (fig. 32), the vanishing point being to one side of the centre, the transverse lines, being… … is wrong for the reasons stated. The lines ah, cd, &c. should not be parallel to the lower edge of the
Perspective · Drawing
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
![An illustration from Practical perspective; or, Perspective made easie. Teaching by the opticks, how to delineate all bodies, buildings, or landskips, &c. By the catoptricks, how to delineate confused appearances, so as when seen in a mirror or pollisht body of any intended shape, the reflection shall shew a designe. By the dioptircks [sic], how to draw parts of many figures into one, when seen through a glass or christal cut into many faces.. (1670)](https://img.insideoutlibrary.com/img/200/ia-practicalperspec00moxo-97-0.webp)
