The most celebrated of Drake's adventures along the Spanish Main was his capture of the Spanish Silver Train at Nombre de Dios in March 1573. He raided the waters around Darien (in modern Panama) with a crew including many French privateers including Guillaume Le Testu, a French buccaneer, and African slaves (Maroons) who had escaped the Spanish. One of these men was Diego, who under Drake became a free man was also a capable ship builder. Drake tracked the Silver Train to the nearby port of Nombre de Dios. After their attack on the richly laden mule train, Drake and his party found that they had captured around 20 tons of silver and gold. They buried much of the treasure, as it was too much for their party to carry, and made off with a fortune in gold. (An account of this may have given rise to subsequent stories of pirates and buried treasure). Wounded, Le Testu was captured and later beheaded. The small band of adventurers dragged as much gold and silver as they could carry back across some 18 miles of jungle-covered mountains to where they had left the raiding boats. When they got to the coast, the boats were gone. Drake and his men, downhearted, exhausted and hungry, had nowhere to go and the Spanish were not far behind.