In 2001 the Metropolitan Museum of Art offered as the very last work in its large, enormously popular exhibition Vermeer and the Delft School a small painting of a young woman seated at a virginal (a keyboard instrument of the seventeenth century). Presented without fanfare by curator Walter Liedtke and not included in the catalogue, this picture was familiar to specialist scholars: as the final image in Lawrence Gowing’s seminal 1952 monograph on Vermeer, the...