<Li> Kot Dijian (Early Harappan) phase, c. 2800--2600 BC . </Li> <Li> Harappan Phase, c. 2600--1900 BC . </Li> <Li> Transitional Phase, c. 1900--1800 BC . </Li> <Li> Late Harappan Phase, c. 1800--1300 BC . </Li>

Who had first noticed the ruins of harappa