Those who have read the previous volumes of this series will require no introduction to Will Smith, George Benton, Charley (Sandy) Green, or Tommy Gregory. As will be remembered, they were all members of the Beaver Patrol, Chicago. Will Smith had recently been advanced to the important position of Scoutmaster, and George Benton had been elected to the position left vacant by the advancement of his chum, that of Patrol Leader. Besides carrying the badges of their offices and their patrol, the boys all wore medals showing that they had qualified in the Stalker, Ambulance, Seaman and Pioneer grades.