You know, I have been watching "its the dog or me" on animal planet and the lady who trains bad dogs has a trick where if you're running after a dog he'll keep running so next time you call his name and walk the other way. Since you're the pack leader he will want to follow you. I dont know how well this works, especially with beagles and their stubborn curiousity, but it might be something to try out. Of course, I know that if the same situation happeend to me i would be running after Arty as well.. its like a reflex or an instinct. Im glad this story had a really good ending though!