For   The Tribune | July 18, 1980 The Orient Express was made famous by Agatha Christie. In the days of the raj the most romantic train on the subcontinent was the Frontier Mail which ran from Bombay to Punjab and the Khyber Pass. Men like John Masters have described the fascinating journey by this train, full of bearded Sikh soldiers and hawk nosed Pathans, from the sultry Bombay coast to the dry uplands of Punjab and the Frontier Province. The Punjab Mail was another such t