Feildes Weir is a weir on what river that is one of the largest rivers in London and the easternmost major tributary of the Thames?
Feildes Weir: Feildes Weir is a weir on the River Lea located near Hoddesdon, Hertfordshire at the confluence of the River Lea and River Stort. River Lea:  It is one of the largest rivers in London and the easternmost major tributary of the Thames.
River Lea