During his seventh and eighth seasons, Woolley found several Kassite graves within the walls just southeast of the Palace of Bel-Shanti-Nanna along the east city wall. However, due to their ruinous condition, he did not provide further descriptions. All what he concluded was that they were the foundations of a series of residential houses and a military fort dated to the Isin-Larsa period.
Woolley was comfortable labeling it as a Kassite Fort due to its typically Kassite construction. He noted the brick size and the presence of walls formed of two skins of well-laid bricks enclosing a core of mixed rubble that was a typical style attributed to the Kassite King Kuri-galzu (ca. 1400 BCE).