Johnson had become wealthy as a trader and acquired thousands of acres of land in the Mohawk River Valley from the Iroquois Mohawk of New York .
The British asked William Johnson , Superintendent of Indian Affairs , to lead the investigation .
William Johnson had become wealthy as a trader and acquired thousands of acres of land in the Mohawk River Valley from the Iroquois Mohawk of New York .
The British asked William Johnson , Superintendent of Indian Affairs , to lead the investigation .