The Statutes at Large of Pennsylvania from 1682-1809, 18 vols. (Harrisburg, Pennsylvania: Wm. Stanley Ray, 1898), vol. 5 1744-1759, pages 133-140, 502-503, Chapter CCCXCII, "An Act for Erecting Part of the Counties Of Philadelphia, Chester and Lancaster into a Separate County," March 11, 1752, confirmed by the King in Council, May 10, 1753, creation of Berks County, digital images, Internet Archive (https://archive.org : July 26, 2018).
"PHMC Historical Markers Search". Pennsylvania Historical and Museum Commission. Commonwealth of Pennsylvania. Archived from the original(Searchable database) on March 21, 2016. Retrieved January 25, 2014.
legis.state.pa.us
Center, Legislativate Data Processing. "Find Your Legislator". The official website for the Pennsylvania General Assembly. Retrieved May 23, 2017.
"PHMC Historical Markers Search". Pennsylvania Historical and Museum Commission. Commonwealth of Pennsylvania. Archived from the original(Searchable database) on March 21, 2016. Retrieved January 25, 2014.