The Three-Legged Beagle and The Danger Bell

Both young and old who read this rhyme, Look out for clues and note them down And see if you can winkle out the logic in this tale. One clue is master of its kind; Discover that and take its lead. Without it, all the others will have been to no avail. And if you can resist the urge To read the ending of my yarn Until you've gleaned the answer to the riddle, have no fear! For greater yet will be your joy In finding out the reason why The cuckoo and the beagle brave are so important here! Now Read On...................