Vasanta Choudhuri was close to Kumar and visited his library frequently. For a length of time he was playing a leading persona in a drama performance at the Clem Brown Institute Hall at Sealdah and he would visit the Taltala home of Kumar in the late afternoon to a session of 'adda' accompanied by tea before going over to the stage. Most of the discussion veered over books, on numismatic, his collection of Ganesh and sometimes the character he was playing in the latest film on the studio floor. In 1964, Vasant Chaudhuri was offered the role of the 19th. Century, educator, Raja Rammohan Roy by the, not so well known, Director Bijoy Basu. Chowdhury had heard of the making of the film in Tollygunge Studio and wanted to play the lead. He was elated on receiving the role and reached my father Nirmal Chandra Kumar, an antiquarian, to give the good news. The detailed study of the Raja began: the way he sat, wore his shawl, his dress and posture. Hundreds of documents were obtained by my father and more were referred to including paintings particularly that of Atul Bose and one by the renowned American portrait painter Rembrandt Peale, not the Dutch. It is during this race for information on the Raja that Kumar discovered an engraving of the Raja from the Calcutta Art Studio. It would not be irrelevant to note here that Vasant Chowdhury performed the role of Raja Rammohan Roy, to the last detail and for many Bengali, Chowdhury became the Raja.The film went on to receive the National Award for the Best Film in 1965.