In which is Included a Short Biographical Notice of the Artists, with a Copious Description of Their Principal Pictures; a Statement of the Prices at which Such Pictures Have Been Sold at Public Sales on the Continent and in England; a Reference to the Galleries and Private Collections, in which a Large Portion are at Present; and the Names of the Artists by Whom They Have Been Engraved; to which is Added, a Brief Notice of the Scholars & Imitators of the Great Masters of the Above Schools