In Drawings one finds a great Variety, from their being First Thoughts, (which are often very Slight, but Spirituous Scrabbles) or more Advanced, or Finish’d. So some are done one Way, some Another ; a Pen, Chalks, Washes of all Colours ; heightned with White, Wet, or Dry, or not Heightned.
An Essay on the whole art of criticism […] ; Of the Knowledge of Hands, p. 132
RICHARDSON, Jonathan, Two Discourses. I. An Essay on the whole Art of Criticism as it relates to Painting. Shewing how to judge I. Of the Goodness of a Picture ; II. Of the Hand of the Master ; and III. Whether ‘tis an Original, or a Copy. II. An Argument in behalf of the Science of a Connoisseur ; Wherein is shewn the Dignity, Certainty, Pleasure, and Advantage of it. Both by Mr. Richardson, London, W. Churchill, 1719.