“No, you're not getting exhausted yet, Garraty." [Stebbins] jerked a thumb at Olson's silhouette. "That's exhausted. He's almost through now."Garraty watched Olson, fascinated, almost expecting him to drop at Stebbins's word. "What are you driving at?""Ask your cracker friend, Art Baker. A mule doesn't like to plow. But he likes carrots. So you hang a carrot in front of his eyes. A mule without a carrot gets exhausted. A mule with a carrot spends a long time being tired. You get it?""No."Stebbins smiled again. "You will. Watch Olson. He lost his appetite for the carrot. He doesn't quite know it yet, but he has. Watch Olson, Garraty. You can learn from Olson."Garraty looked at Stebbins closely, not sure how seriously to take him. Stebbins laughed aloud. His laugh was rich and full-a startling sound that made other Walkers turn their heads. "Go on. Go talk to him, Garraty. And if he won't talk, just get up close and have a good look. It's never too late to learn.”