In the 1970s, newly-discovered pictures of “Victorian waifs” were a hit with both historians and art collectors. The chemistry seemed right. The context . . . not so much. But people only learned that too late.
The identification of fakes and forgeries is a basic issue that has always raised controversy. This is unsurprising, of course–the enormous sums garnered by top paintings would turn to dust as soon as a question as to their authenticity arose.