Not until nearly four thousand years later, in fact in the early 1920s, was its existence even suspected. It was pure chance that Indian and British archaeologists, while investigating later more visible ruins at Mohenjo-daro in Sind and at Harappa in the Panjab, made the prehistoric discovery of the twentieth century. They called their find the ‘Indus valley civilisation’, and drew the obvious comparisons with those of Egypt and Sumeria.
