I picked up a very interesting book called 'Indian voices of the great war: Soldiers' letters, 1814-18' by David Omissi, who works at the University of Hull (Dept. of History and Centre for Indian Studies). It contains the contents of letters sent by (and to) soldiers from the then undivided Indian subcontinent during the first world war. These have been translated in English from the original languages/scripts in which they were transcribed (mainly Gurmukhi, Urdu, Hindi with some other occasi