the wreck indicated a date of 80–70 BC, the Hellenistic pottery a date of 75–50 BC, and the Roman ceramics were similar to known mid-first century types. Any possible association with Sulla was eliminated, however, when the coins discovered in the 1970s during work by Jacques Cousteau and associates were found to have been minted between 76 and 67 BC. Nevertheless, it is possible that the sunken cargo ship was en route to Rome or elsewhere in Italy with looted treasures to support a triumphal parade. Alternatively, perhaps the cargo was assembled on commission from a wealthy Roman patron. Remains of hull planks showed that the ship was made of elm, a wood often used by the Romans in their ships. Eventually, in 1964, a sample of the hull planking was carbon dated, and delivered a calibrated calendar date of 220 BC ± 43 years. The disparity in the calibrated radiocarbon date and the expected date based on the ceramics and coins was explained by presuming that the sample plank originated from an old tree, cut much earlier than the ship's sinking event. Further evidence for an early first-century BC sinking date came in 1974, when Yale University Professor Derek de Solla Price published his interpretation of the Antikythera mechanism. He argued that the object was a calendar computer. From gear settings and inscriptions on the mechanism's faces, he concluded that the mechanism was made about 87 BC and lost only a few years afterward. 21st-century expeditions In 2012, marine archeologist Brendan P. Foley (formerly of the Woods Hole Oceanographic Institution in the United States and since 2017 at Lund University, Sweden) received permission from the Greek government to conduct new dives around the entire island of Antikythera. With project co-director Dr. Theotokis Theodoulou, the divers began a preliminary three-week survey in October 2012 using rebreather technology, to allow for extended dives down to a depth of , for a fuller, complete survey of the site. The team completed an underwater circumnavigation of the island, documented several isolated finds, relocated the Antikythera Wreck, and identified a second ancient shipwreck a few hundred meters south of the Antikythera Wreck. The Hellenic Ephorate of Underwater Antiquities (EUA) has continued investigations at Antikythera. In 2014 and 2015 it conducted robotic mapping surveys over the two ancient wreck sites, cooperating with the Woods Hole Oceanographic Institution and the Australian Centre for Field Robotics of