Graphics : a manual of drawing and writing, for the use of schools and families (1838)
Peale, Rembrandt, 1778-1860, author · Philadelphia : J. Whetham · leaf 83
“7 MANUAL OF DRAWING. CONTINUITY OF LINE. … When the copy of any object is made upon a separate piece of paper, its accuracy may also be found in the continuity of line. Hold your paper square, and bring it so that the line you are making, or a line drawn through it, if it be supposed to be extended, would touch the com¬ mencement of the…
Drawing -- Study and teaching · Penmanship -- Study and teaching
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.