The elements of art; a manual for the amateur, and basis of study for the professional artist (1848)
Chapman, J. G. (John Gadsby), 1808-1889, Chapman, J. G. (John Gadsby), 1808-1889. American drawing book · London, D. Bogue · leaf 50
46 RUDIMENTS OF DRAWING. … 61. Let it be remembered that a drawing, incorrect in outline and the just proportions of the parts, can never be said to be finished, however great the labor bestowed upon the elaboration of its details. Care should be taken, therefore, that these important points are well determined first : and…
Drawing
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.