History of the Anushilan Samiti
Around 1902, Aurobindo Ghosh arranged for Bannerjee to return to Calcutta to begin organisational work, where he began a gymnasium and a youth society. It was at this time that Bannerjee came in touch with Vibhuti Bhushan Bhattacharya, Sarala Devi Ghoshal and Pramathanath Mitra. In Calcutta, a few clubs and societies were still active at the time. Most notable was a gymnasium in Ballygunge Circular Road run by Sarala Devi herself, a second was an organisation named "Anushilan Samiti" founded by Satish Chandra Basu with the patronage of Pramathanath Mitra. A third one was a youth club called "Attōnnōti Samiti" (Self-improvement society) in central Calcutta.
History of the Anushilan Samiti
Western Anushilan Samiti in the aftermath of Manicktala Conspiracy found more prominent leader in Jatindra Nath Mukherjee which emerged distinctly as the "Jugantar group". Meanwhile, Rash Behari Bose extended the groups reach into north India, where he found work in the Indian Forest Institute in Dehra Dun. Mukherjee took over the leadership of the secret society to be known as the Jugantar Party. He revitalised the links between the central organisation in Calcutta and its several branches spread all over Bengal, Bihar, Orissa and several places in U.P., and opened hideouts in the Sunderbans for members who had gone underground The group slowly reorganised guided by Mukherjee's efforts, aided by an emerging leadership which included Amarendra Chatterjee, Naren Bhattacharya and other younger leaders. Some of its younger members including Taraknath Das left India. Through the next two years, the organisation operated under the covers of two seemingly detached organisations, "Sramajeebi Samabaya" (The Labourer's cooperative) and Harry & Sons. At around this time, Jatin began attempts to establish contacts with the 10th Jat Regiment then garrisoned at Fort William in Calcutta. Narendra Nath carried out through this time a number of robberies to obtain funds. In the meantime, However, a second blow came in 1910 when Shamsul Alam, a Bengal Police officer then preparing a conspiracy case against the group, was assassinated by an associate of Jatindranath by the name of Biren Dutta Gupta. The assassination led to the arrests which ultimately precipitated the Howrah-Sibpur Conspiracy Case.