 Meru traditions recorded in Mwimbi and Muthambi recount that the pastoral Lumbwa lived in association with a hunting community remembered as Agumba (or Gumba).The Gumba were said to live in "Agumba pits", large or squarish depressions, located along a line that runs roughly along the zone at 7,000–7,500 feet.This zone delineates the lowest edge of the forest from the highest point in the star-grass zone.