Glen and Bessie Hyde began their honeymoon trip down the Green and Colorado Rivers on October 23, 1928. They vanished without a trace. More than forty years later, in 1971, an older woman on a Grand Canyon river trip announced she was Bessie Hyde. She said she had stabbed Glen, hiked out, and started life anew. In 1976 a skeleton thought to be Glen Hyde's was found at the canyon rim with a bullet in the skull. Since then, another suspected Glen...