However, I should tell you, that some painters do imitate nature. I have seen a picture in which the painter had represented a five-dollar bill, pinned on a board, and so accurately had he imitated the bill and the board that, until you were close to them and passed your hand over the flat canvas, you would not know it was a picture. And there is a story told of a Greek painter, Zeuxis, that he once imitated a bunch of grapes so exactly, that the birds flew down and pecked at it.