As chronicled in your researcher's journal as I researched my history of early lifestyles in South Asia...
Learned why it's been impossible to
find archaeological info after a certain date from Harappa: people started
building an AMUSEMENT PARK on the site! A prominent Pakistani
archaeologist according to omniscient (cough) Wikipedia was very
instrumental in stopping the nonsense when of course the builders began
finding very valuable archaeological artefacts; the site is far far from
being completely explored.
Current time travel apparatus location: The Round Library, Bangalore, India