 In 1907, Barin Ghosh sent Hem Chandra Kanungo (Hem Chandra Das) to Paris to learn bomb-making from Nicholas Safranski, a Russian revolutionary in exile.Madam Cama, a leading figure of the Paris Indian Society and India House, a revolutionary organisation in London, also lived in Paris and was associated with V.D.Savarkar, who later published a bomb-making manual through India House.