Rai Bahadur Daya Ram Sahni CIE (16 December 1879 – 7 March 1939) was an Indian archaeologist who supervised the excavation of the Indus valley site at Harappa in 1920 to 1921. The first report on Harappan excavations came out on 29 March 1921, published by John Marshall, which is why various historians have chosen 1921 AD as the period of Harappan excavation. A protege of John Marshall, in 1931 Sahni became the first Indian to be appointed Director-General of the Archaeological Survey of India (ASI), a position which he served in till 1935. Source: Wikipedia (en)