The northern colonial frontier, 1607-1763/ Douglas Edward Leach Leach, Douglas Edward, 1920- Frontier and pioneer life Northeastern States. F106 .L4 973.23 LEN Bibliography: p. 239-255. New York: Holt, Rinehart and Winston, 1966. 1966. 1966 Text xviii, 266 p.: eng Histories of the American frontier Northeastern States History. United States Territorial expansion. Northeastern States.