02/27/2012 11:48 am ET Updated Apr 28, 2012

Pollocks And Rothkos, Sold For Millions, Called Forgeries -

Nearly 17 years ago Glafira Rosales, a little-known art dealer from Long Island, walked into Knoedler & Company's grand Upper East Side town house with a painting she said was by Mark Rothko.

She showed the small board with two clouds of bruised color floating against a backdrop of pale peach to Ann Freedman, the new president of Knoedler, New York's oldest art gallery.

"It was immediately, from my eyes, a work of interest," Ms. Freedman recalled later. She was so impressed that she ended up buying the work herself.