Brian Sewell Sir: In complimenting Dr Douglas Hassall (March 2015) on writing a lengthy and very well argued essay on English painter Frank Auerbach—and Quadrant no less on publishing it—I need nevertheless to raise an important cavil. While Dr Hassall is thoroughly justified in dismissing a great deal of contemporary art criticism as piffle, he is quite wrong even to suggest that English art critic Brian Sewell is ever merely glib. Sewell, who has been undone finally only by ill health, has an excellent analytical mind, which is very rare indeed in art criticism, and couples this with an often…