The Indus Civilization (Cambridge History of India, Supplementary Volume) c13.16

c13.16

The filling of some at least of the graves was heaped up above the surface-level, and was in one instance actually built up of mud bricks; and superficially it may be supposed that the appearance of the cemetery, with its low north-south mounds, was that of a modern Muslim graveyard, such as to-day in fact occupies the summit and environs of the neighbouring citadel.