Chaturvedi was a contemporary of Mahatma Gandhi , whom he first met when studying the Vedas in a '' gurukula '' in northern India . Subsequently , he became an ardent follower of Gandhian methods . He was a witness to many events in the Indian independence movement , including being an eyewitness to the 1919 Jallianwala Bagh massacre . He was known as Gandhiji 's Postman , as he took down and delivered letters dictated by Gandhi addressed to the Viceroys or Governors-General . Gandhi called him ' Karnataki ' . He lost the use of his right arm in 1938 while travelling with Gandhi , when the railwayman detached the last three compartments of the train as it was struggling to climb uphill . He took part in the freedom struggle and was arrested at least 31 times during the freedom struggle , landing in prisons all over the country from Peshawar to Vellore
Jallianwala Bagh massacre
Jallianwala Bagh massacre
Sudhakar Chaturvedi