text: " Does he really mean or believe that this new method consisted only in the use of linseed and nut oils? Is he acquainted with the works of John of Bruges or with that picture of Andrea del Castagno the supposed murderer of Domenico which is called by Guarienti "the wonder of painting;" and which by the description of its finish _particularly of the room in which the action is represented_ is supposed to have been an imitation of the style of the Flemish master? If it be asked how could any good practice in any art be lost? we have only to answer that we are not bound to _account_ for a notorious fact with regard to arts in general