All the different Degrees of Goodness in Painting may be reduc’d to these three General Classes. The Mediocre, or Indifferently Good, the Excellent, and the Sublime. The first is of a large Extent ; the second much Narrower ; and the Last still more so. I believe most people have a pretty Clear, and Just Idea of the two former ; the other is not so well understood ; which therefore I will define according to the Sense I have of it ;
An Essay on the whole art of criticism […] ; Of the Goodness of a Picture, &c., p. 34
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.