and Mwehin Nahnmwarki (Period of the Nahnmwarki, c. 1628 to c. 1885). Pohnpeian legend recounts that the Saudeleur rulers, the first to bring government to Pohnpei, were of foreign origin. The Saudeleur centralized form of absolute rule is characterized in Pohnpeian legend as becoming increasingly oppressive over several generations. Arbitrary and onerous demands, as well as a reputation for offending Pohnpeian deities, sowed resentment among Pohnpeians. The Saudeleur Dynasty ended with the invasion of Isokelekel, another semi-mythical foreigner, who replaced the Saudeleur rule with the more decentralized nahnmwarki system in existence today. Pohnpeian historic society was highly structured into five tribes, various clans and sub-clans; each tribe headed by two principal chiefs. The tribes were organized on a feudal basis. In theory, "all land belonged to the chiefs, who received regular tribute and whose rule was absolute." Punishments administered by chiefs included death and banishment. Tribal wars included looting, destruction of houses and canoes and killing of prisoners. Pre-Spanish population estimates are deemed unreliable. Earliest European contacts Pohnpei's first European visitor was Spanish navigator Álvaro de Saavedra on 14 September 1529 shortly before his death, when trying to find the way back to New Spain. He charted it as San Bartolomé and called this one and the surrounding islands as Los Pintados (literally, "the painted ones" in Spanish) because the natives were frequently tattooed. It was later visited by the navigator Pedro Fernandes de Queirós, commanding the Spanish ship San Jeronimo. on 23 December 1595; his description is brief, he made no attempt to land. 19th-century visitors There is good documentation about Australian sailor John Henry Rowe, who arrived in his barque John Bull on 10 September 1825, though he did not land as his vessel was chased off by native canoes. The first lengthy description of the island and its inhabitants is presented by the Russian explorer Fyodor Litke, whose ship Senyavin gave the island group of Pohnpei, Ant and Pakin its name. From 14 to 19 January 1828, his boats attempted to land but could not due to the hostility shown by the islanders, but natives then came aboard his ship, "some trading occurred, a short vocabulary was compiled, and a map made." F.H. von Kittlitz, a member of the Litke expedition made a further descriptive account, including the offshore ruins of Nan Madol, and the two reports together provided the first real knowledge of Pohnpei. It is