Since evils cancel out, avoid odd numbers of them ... even if you have to get an odder one! The September evening was hot and humid, and Helen Raymond, watching her husband pace nervously about the living room, grew tenser by the minute. Robert would walk up to an open window, sniff abstractedly, move to the next window, and repeat the performance. "For goodness' sakes, Robert, what are you snuffling about?" she finally demanded in exasperation. She had been on edge ever since her cousin Dora ha