HIS WINSOME TUNE LEADS THE RATS TO DOOM: Shown above is none other than the famed Pied Piper of Hamelin who played his tune and lured the rats away. Arthur Moore takes the part of the Piper in the presentation of "The Pied Piper of Hamelin," in opera form, which will be given by University High School music and dramatics departments at 8:15 Friday and Saturday nights in the school auditorium. Perched on Arthur's shoulder are Snoppy and Oscar who have been borrowed from the University Museums for principal roles in the opera.