Freehand perspective and sketching; principles and methods of expression in the pictorial representation of common objects, interiors, buildings and landscapes
A drawing manual by Dora Miriam Norton, self-published in Brooklyn in 1910, teaching freehand perspective to art students and draughtsmen. The line diagrams show boxes, books, tables and room corners strung with dotted convergence lines to labelled vanishing points on a marked eye level, offering ready-made construction grids, annotated cubes and sparse hatched interiors.
