Albert and Sylvia Caldwell were one of those rare Titanic families who lived through the tragedy at sea. Their lucky rescue aboard the Lifeboat 13 is told for the first time here. But the trip was only one part of a bigger nightmare. The Caldwells had been Presbyterian missionaries in Bangkok, Siam, but fled in what they described as a desperate journey around the world to save Sylvia's health. Fellow missionaries, however, believed that the couple...