Excavations were conducted there for a total of six months, between Christmas of 1903 and June 1905, for the University of Chicago, primarily by Dr. Edgar James Banks, with the final part of the dig being under engineer Victor S. Persons. It proved that these mounds covered the site of the ancient city of Adab (Ud-Nun), hitherto known only from the "Sumerian King List" and a brief mention of its name in the introduction to the Hammurabi Code. The city was divided into two parts by a canal, on an island in which stood the temple, E-mach, with a ziggurat, or stepped tower. It was evidently once a city of considerable importance, but deserted at a very early period, since the ruins found close to the surface of the mounds belong to Shulgi and Ur-Nammu, kings of the Third Dynasty of Ur in the latter part of the third millennium BC, based on inscribed bricks excavated at Bismaya. Immediately below these, as at Nippur, were found artifacts dating to the reign of Naram-Suen and Sargon of Akkad, c. 2300 BC. Below these there were still of stratified remains, constituting seven-eighths of the total depth of the ruins. Besides the remains of buildings, walls and graves, Dr. Banks discovered a large number of inscribed clay tablets of a very early period, bronze and stone tablets, bronze implements and the like.