Pennsylvania Magazine of History, 39 vols. Published by the H. S. P., Phila., 1877-1915.
Penny, Norman. The Journal of George Fox. University Press. Cambridge, 1911.
Phipps, Joseph. Original and Present State of Man.... Trenton, 1793.
Pioneer, Der Deutsche. Erinnerungen aus dem Pioneer-Leben der Deutschen in Amerika. 18 vols. Cincinnati, 1869-1887.
Prittle, Prattle, or a familiar discourse on the I, thou, he or she, we, ye, or you etc. ... by a Lover of the Truth. London, 1752.
Protestant Episcopal Historical Society Publications, Vols. 1 and 2. 1915.
Proud, Robert. History of Pennsylvania, 2 vols. Phila., 1877.
Purver, Anthony. Counsel to Friends’ Children on Education, by J. Freame, with ... poems. London, 1799.
Religious Instruction in our Schools. A letter issued by an executive of the Friends’ Guild of Teachers, No. 9, in a volume of pamphlets. York, No date.