 This work was entrusted to Tapan Raychaudhuri, then of the Department of Islamic History and Culture of the University of Calcutta.In 2001, approximately 2,000 photographs of himself and his family members were given in loan by one of his grandsons, Barun De, to the photographic archives of the Centre for Studies in Social Sciences, Calcutta.Later, when the archive was shifted to the newly established Jadunath Bhavan Museum and Resource Centre, CSSSC, Calcutta, the photographs too were deposited there.