A wall and ditch system north of Benin City
book chapter 1975 Rees, A. R. (Alun Rocyn)

West African Regional DevelopmentAfrica > Western Africa
An earthwork or wall-and-ditch system to the north of Benin City is at least 16.5 miles long and encloses an area of about 17 square miles. The author speculates it may have enclosed a village, while admitting that the relationship of the earthworks ...