(STATEN ISLAND, N.Y.) — A treasure hunter has deployed high-tech equipment in the Arthur Kill to search for millions of dollars worth of silver bars that spilled from a barge in 1903, Smithsonian magazine reported. The casualty involving a tug and the barge Harold resulted in the Guggenheim family losing a chunk of its fortune when bad weather caused the tow to tip, dumping much of the refinery-bound load into the tidal waterway. Eighty-five percent of the loot was recovered, and the rest may be worth an estimated $20 million now.