Probir Kumar Bose (born on May 1, 1955) of New Panvel, Mumbai has collected 160 letters from various dignitaries like Indira Gandhi, Mother Teresa, Pope John Paul II and various other politicians in response to his letters and emails as a hobby till January 2012. The first letter was sent in 1969 to fourth President of India V. V.Giri and the quick reply from the president heightened his interest.