Kraft, Herbert C. The Lenape: Archaeology, History, and Ethnography. Newark, NJ: The New Jersey Historical Society, 1988.
A comprehensive look at the some of the first farmers in Pennsylvania whose beans, corn, pumpkins, and squash fed the first European settlers.
Merrell, James H. Into the American Woods: Negotiators on the Pennsylvania Frontier. New York: W. W. Norton, 1999.
A study of European-Indian relations in Pennsylvania, from the era of William Penn to the end of the Seven Years' War, with an emphasis on the native and colonial peoples who served as brokers or "go-betweens" between the two cultures.
Weslager, C. A. The Delaware Indians. New Brunswick, NJ: Rutgers University Press, 1991.
A well researched and well written study of the Lenape from earliest times through the twentieth century.
AFSC Website: They Served without Weapons http://www.afsc.org
Providing a general overview of the CPS with photographs of their activities.
Carlisle Indian Industrial School Website http://www.carlisleindianschool.org
Created by a historian devoted to recovering the full story of the Carlisle school
Delaware County Historical Society http://www.delcohistory.org/ashmead/ashmead_pg21.htm
Ashmead's History of Delaware County is excellent, richly detailed. A great source for both the curious and the scholarly.
Eastern State Penitentiary Website http://www.easternstate.org
Interactive and informative website run by the Eastern Sate Penitentiary Historic Site, Inc.
Penn's Holy Experiment http://archive.pym.org/exhibit/p078.html
Contains much valuable historical information and hours of operation and directions for visitors.
Quaker Information Center http://www.quakerinfo.org
Includes information about the Religious Society of Friends, including Quaker beliefs & practices, history, organizations, literature, activities, and events; volunteer & service opportunities; and some employment listings
The Swedish Colonial Society http://www.colonialswedes.org/
Website on Swedish settlements in North America that includes historic sites and other useful information.
William Penn on QuakerInfo.com http://www.quakerinfo.com/article1045.html
Includes biography of Penn and excerpts from his writings.
William Penn, Proprietor http://xroads.virginia.edu/~CAP/PENN/pnhome.html
Helpful website detailing Penn's activities in his burgeoning colony.