Don Ritchie SYDNEY — In those bleak moments when the lost souls stood atop the cliff, wondering whether to jump, the sound of the wind and the waves was broken by a soft voice. "Why don't you come and have a cup of tea?" the stranger would ask. And when they turned to him, his smile was often their salvation. For almost 50 years, Don Ritchie has lived across the street from Australia's most notorious suicide spot, a rocky cliff at the entrance to Sydney Harbour called The Gap. And in that time, the man widely regarded as a...