Workers digging a deep pit during the 1935-36 excavations in Chanhu-daro, Sindh. Chanhu-daro was the only American run pre-partition Indus excavations, by the Museum of Fine Arts in Boston, and led by Ernest J.H. Mackay. They revealed a highly-advanced ancient Indus manufacturing site. An illustrated 1937 article by Dorothy Mackay describing it in Finds at Chanhu-daro.