Hollow baked brick buttresses were later built up against the original "granary" structure on top of a shallow mud-brick platform [400] that itself overlies the mud-brick platform of the original "granary". Below these platforms is baked brick wall

Flakes of various shades of agate, carnelian, jasper, chert, and lapis lazuli indicate the range of raw materials being processed in this part of Harappa during the Ravi phase.

Excavation of one buttress [99] shows how the silt and garbage from the street spilled into the hollow area from the outside of the "granary", eventually blocking it entirely.

During drilling, the tips of agate drills become hot and often spall off.