Billy Peterson was a boy with a purpose today as he walked down a quiet street in Wakefield. Of course occasionally he'd make a little detour into a vacant lot to pick up a pebble, talk to a stray cat, or perhaps to investigate the possibilities of an old apple box. Billy was only ten years on, and it is understandable that he should get sidetracked occasionally from whatever project was underway, but most of the time he was thinking of a friend of his...