 In order to establish a legal claim to the recovered cargo, Odyssey filed in U.S. court for an arrest of the cargo on April 4, 2007 and then published notice of that arrest on May 7, 2007.On May 31, 2007, the Spanish government, pursuant to the notice of the arrest, filed a claim against the recovered cargo based on the claim that the silver and gold coins recovered by Odyssey Marine came from a Spanish vessel, the "Nuestra Señora de las Mercedes", a 36-gun Spanish frigate that went down off the Portuguese coast en route from Montevideo to Cádiz.The "Mercedes", which was sunk by British Navy ships in October 1804, was known to be carrying more than a million silver dollars.