Ancient man.
That would be the River Thames.
The River Thames is the major river through London, cutting right through the middle of the city. There are many other rivers in London, such as the River Lee (or Lea) and the River Brent.
The river Thames (pronounced temz)
London is situated on the River Thames (pronounced 'temz'.
Thames River
The Thames flows through London.
The River Thames has multiple confluences. One such is the confluence of the River Thames and the River Darent at Dartford.
The river Thames.
The river Thames is in England.
River Thames.
Nobody discovered it - it was built as a means of getting from one side of the River Thames to the other. It wasn't always there, it had to be constructed.
The River Thames is pronounced "tems." It is the river that runs through London, England.