Prof. Ordhendra Coomar Gangoly (1881-1974), popularly known as O.C.Ganguly, referred to Nirmal Chandra Kumar for his monumental work RUPAM. Rupam was an illustrated quarterly journal of Oriental art. And illustrated it was. Every page had litho prints of original paintings. Many of them of rare miniatures. It fell upon Kumar to trace them out. And that was no mean task. Kumar had to travel extensively in search of the exact paintings. But Gangoly rewarded him with fine reproduction of the same. They were printed on hand-made paper, by lithography process with letterpress printing. What a reproduction. They are still collector’s item.Prof. O.C.Ganguly is one of the foremost authorities on Indian Art. He was one of the founders of Indian Society of Oriental Art of which he was for many years Secretary and Vice President. Foremost he was a teacher of arts. Himself very erudite on Indian art, he took all opportunity to spread the knowledge. He wrote a number of books on Indian Art, chief among them being Rajput Paintings, the book was reviewed by none other that the famous authority on Indian Art Hermann Goetz in Artibus Asiae, His other well known book being Ragas and Raginis. Rupam was his passion. He founded and edited Rupam, which was acclaimed as finest journal of Indian art. Each volume had approximately 106pages, profusely illustrated in color and black &white, including many tipped-in plates with vellum overlays. Text was in English. He was able to produces only forty-four issues of this highly important scholarly journal devoted to the arts of the Indian Subcontinent, Himalayas, China and Islam. Published between January 1920 and October 1930 .