For less than a year between 1862–63, Peruvian ships, engaged in what became to be called the "blackbirding" trade, combed the smaller islands of Polynesia from Easter Island in the eastern Pacific to Tuvalu and the southern atolls of the Gilbert Islands (now Kiribati), seeking recruits to fill the extreme labour shortage in Peru. In what years did Peruvian ships seek laborers in the Polynesian islands?