Historians and scientists have tossed cold water on a maritime explorer's belief that something remains of the 342 Chinese tea chests flung into Boston Harbor during the 1773 Boston Tea Party.

A state archaeological board also adopted a go-slow approach Thursday to claims of sunken historical treasure made by maritime explorer Barry Clifford, who gained fame four years ago when he salvaged the wreckage of the 18th century pirate ship Whydah off Cape Cod.The board tabled Clifford's request for exclusive rights to search Boston Harbor for artifacts from the December night when the Sons of Liberty staged the first act of revolution against King George III by hurling the chests over the side of ships docked at Griffins Wharf.