Old hockey cards and a Rembrandt-ish painting: Some attic treasures are auctioned for millions

Kaja Veilleux has been hunting New England attic treasures for more than 50 years. He once found a copy of the Declaration of Independence sitting on a pile of trash, and he made headlines this year when he stumbled upon a million-dollar portrait gathering dust in an old farmhouse in Maine that may have been painted by the Dutch master Rembrandt. Then there was the time, Veilleux said, he was shown a $50,000 gold coin kicking around in a tool drawer—only to have the well-meaning owner...