Art: Gary's Gainsborough

"Three hundred and fifty eight . . . nine . . . three hundred and sixty . . . three hundred and sixty . . . three hundred and sixty . . . fair warning . . . three hundred and sixty . . . are you all through . . . three hundred and sixty thousand dollars for this masterpiece by Thomas Gainsborough. . . ."

The auctioneer dropped his hammer and a boy trotted out behind the curtain to lift The Harvest Waggon off the stage and replace it with Frans Hals' A Young Cavalier. Sir Joseph Duveen had just...