True North Gallery Learn more about True North Frederick Cook, 1907: True discoverer of the North Pole? Robert Peary with sledge dogs aboard his support vessel, headed for his final assault on the North Pole, 1909. Arctic sledge dog. Eskimo couple who assisted Cook in 1908. Cook's North Pole photo, April 21, 1908. Peary's teams topping icy hummock on northbound journey, 1909. Peary at time of his last Arctic expedition, 1909. Triumphant reception of Cook (left) in Copenhagen in September 1909, greeted as discoverer of the North Pole.