National Geographic : 1943 Jan
Your Dog Joins Up 109 The Colonel's Doberman Pinscher Threatens a Prowling Stranger Dogs are easily taught to protect their master's house, automobile, or other property, and to attack any one, even an old friend, who dares menace the master himself. Here Lieut. Col. Lambert B. Cain is defended by his trained Doberman. When the Dog, Searching a Battlefield, Finds a Wounded Man, He Signals That Fact by Picking Up and Bringing Back His "Brinsell" This brinsell is a short stick hung from the dog's collar. His work with it is an advanced form of retrieving. Going back to his master with the brinsell in his mouth shows the dog has located a wounded man. Then he leads stretcher-bearers to the rescue (page 93).