<P> Bandyopadhyay joined the Indian museum in Calcutta as an Assistant to the Archaeological Section in 1910 . He joined the Archaeological Survey of India as Assistant Superintendent in 1911, and was promoted to the rank of Superintending Archaeologist of the Western Circle in 1917 . In 1924, he was transferred to the Eastern Circle and took part in the excavations at Paharpur . He took voluntary retirement in 1926 . After teaching at the University of Calcutta, he later joined the Banaras Hindu University in 1928 and held the post till his premature death on 23 May 1930 . </P> <P> Bandyopadhyay's first major independent professional work was in the fields of palaeography and epigraphy . He won the Jubilee Research Prize of the Calcutta University for The Origin of the Bengali Script published in 1919 (and reprinted in 1973). He was the first to study the proto - Bangla script, the original form of Bangla script . He wrote the classic historical works on medieval Indian coins, and the standard works on the iconography of Indian art, in particular Gupta sculpture and architecture . His best known work was Eastern Indian Medieval School of Sculpture, published posthumously in 1933 . </P> <P> Bandyopadhyay is popular for unearthing pre-Buddhist artefacts at the ruins at Mohenjo - Daro; for noting similarities between the site at Mohenjo - Daro and Harrappa . Those discoveries lead to excavations at the two sites that established the existence of the then - unknown Bronze Age Indus Valley Civilisation . His interpretations of this civilisation were published in a number of articles and books: "An Indian City Five Thousand Years Ago"; "Mohenjo - Daro" (in Bangla, Basumati, 1331 BS); Prehistoric, Ancient and Hindu India (posthumously published, 1934) and Mahenjo - Daro--A Forgotten Report . </P> <P> Bandyopadhyay wrote two textbooks for Calcutta University, namely, History of India (1924) and A Junior History of India (1928). His The Age of the Imperial Guptas (1933) is a collection of lectures delivered by him in 1924 . His standard two - volume Bangalar Itihas (History of Bengal) in Bengali (1914 and 1917) was one of the first attempts at writing a scientific history of Bengal . He also wrote two volumes on the history of Orissa, titled History of Orissa from the Earliest Times to the British Period (1930 and 1931). </P>

Who excutive the site of mohenjo daro in sindh
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