Deep digging at the southeast corner of the "granary" revealed an earlier building [wall 330] constructed along the same east-west alignment. This structure could have been built as early as the beginning of Period 3B, ca. 2450 BC.
Ancient Indus walls.
After clearing the overlying silt, the original forms of the baked brick walls and hollow buttresses of the "granary" could be made out.
Overview looking north of excavations at the southeast corner of the "granary" structure undertaken in 1999 (Trench 1C). The higher east-west running walls in the left of the image and the ruined structures in the right of the image all post-date
A massive baked brick revetment wall  surrounds the solid mud-brick foundation platform  of the "granary" that measures approximately 51 meters north-south and 41 meters east-west.
In Trench 57 West, excavations in 2001 revealed a large paving of backed bricks that may have been part of a courtyard or room originally bordered by massive baked brick walls.
Overview of Trench 57 excavations that were continued in 2001 to reveal massive baked brick wall voids and additional baked brick drains. Looking West.
Top plan view of Harappan (Period 3) and Early Harappan (Period 2) walls on the west side of Trench 54.
Overview of the excavations showing the Harappan (Period 3) and Early Harappan (Period 2) walls on the west side of Trench 54. North is to the right.
North-South section plan of Harappan (Period 3) and Early Harappan (Period 2) wall remnants and mud brick platforms on the west side of Trench 54.