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, 1719.1 quotations
However I will here make him [ndr : au lecteur] an Offer of an Abstract of what I take to be those by which a Painter, or Connoisseur, may safely conduct himself, [...] V. The Colouring whether Gay, or Solid, must be Natural, Beautiful, and Clean, and what the Eye is delighted with, in Shaddows as well as Lights, and Middle Tints.