Suddenly, Dora is in keen demand

What makes a painting totally uncommercial one year and a sure-fire seller the next?Clearly, if there was a general principal of financial success to be learned in the art market there would be rather more dealers appearing in the media’s annual rich lists than there are now.

Five years ago, at the Guildford rooms of Clarke Gammon this Kate Perugini (1839-1929) portrait, rig…

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