Sources Cited

• Map Showing the Various Purchases from Native American: J.H.Battle. History of Columbia and Montour Counties, Pennsylvania. Chicago:A.Warner, 1887. (A reprduction by Unigraphic, Inc. 1401 North Fares Avenue Evansville, Indiana 47711 1974)
• Maps Showing Derry Township and Washingtonville fron 1876: G. H. Walker and C.F. Jewett. Columbia and Montour Counties, Pennsylvania. From Recent and Actual Surveys and Records.New York: F.W.Beers and Co.,1876 (A reproduction by Josten's Commercial Publications, 401 Science Park Road, State College, PA 16803 2002)