Bhai Randhir Singh was a saint and revolutionary of the twentieth century, he was the only non foreign resident member of the Gadar Movement. He was sentenced to a long and trivial detention under Lahore Conspiracy case and served all his youth in incarceration. Further he was subjected to inhuman torture but his faith and mystical journey was deepening day by day. This autobiography of his in the form of letters he wrote from his cell to his friends, family and disciples offers an insight into a life of a mystic and a strict disciplinary of the Khalsa Rehait.