The Archipelago of Galapagos has been known by many different names, including the "Enchanted Islands" because of the way in which the strong and swift currents made navigation difficult. The first crude navigation chart of the islands was done by Ambose Cowleyin 1684, and in those charts he named the islands after some of his fellow pirates or after the English noblemen who helped the pirates' cause. The term "Galápagos" refers to the Spanish name given to the Giant Land Tortoises known to inhabit the islands.