Four Boy Scouts, of the Beaver Patrol, Chicago, were in camp on Moose river. They were all athletic young fellows, not far from seventeen years of age, and were dressed in the khaki uniform adopted by the Boy Scouts of America. If you take a map of the British Northwest Territories and look up Moose river, you will discover that it runs through nearly three hundred miles of wilderness, from Lake Missinale to Moose Bay. The reader will well understand, then, how far "Sandy" Green, Will Smith, George Benton and Tommy Gregory had traveled from civilization.