Summary: The analysis dives into the unpublished documents of the Indian National Congress, shedding light on the challenges faced due to the lack of written records by Indian political figures. It highlights the valuable insights obtained from private collections of papers, including agenda for Working Committee meetings, letters from high command to PCC’s, and informational material on party ideologies. The discussion emphasizes the significance of private correspondence among ranking members in understanding the political milieu in which the Assembly operated. The sources mentioned range from the Indian National Archives to private collections like the Prasad papers, Munshi papers, and Ayyar papers. The article also includes an extensive list of original sources available in various archives and libraries, such as the Indian School of International Studies and Lok Sabha Secretariat. It emphasizes the role of these documents in providing a deeper comprehension of Assembly affairs and the historical context in which the Constitution was framed.