1913. Being the record of the expedition that first reached the Boreal Center, 1907 to 1909. With the final summary of the Polar Controversy. This narrative has been prepared as a general outline of my conquest of the North Pole. In it the scientific data, the observations, every phase of the pioneer work with its drain of human energy has been presented in its proper relation to a strange cycle of events. The camera has been used whenever possible to illustrate the progress of the expedition as well as the wonders and mysteries of the Arctic wilds. Herein, with due afterthought and the better perspective afforded by time, the rough field notes, the disconnected daily tabulations and the records of instrumental observations, every fact, every optical and mental impression, has been reexamined and rearranged to make a concise record of successive stages of progress to the boreal center. If I have thus worked out an understandable panorama of our environment, then the mission of this book has served its purpose.