sentences:  The historian Dr. D. B. Dubey states that it appears that between this period, the sandy plain was washed away by the Ganga, to an extent that the temple and tree seen by the Chinese traveller too was washed away, with the river later changing its course to the east and the confluence shifting to the place where Akbar laid the foundations of his fort.As the majority of the houses would have been mud-walled, a flood could easily destroy them.Sir Alexander Cunningham, founder of the Archaeological Survey of India, concluded as much in his reports published in 1875 on the Archaeological Survey, supporting that assumption