Historical Review of Berks County (1958)
Archaeology at the Parvin Homestead: Searching for the Material Legacy of the Underground Railroad (2008)
The Underground Railroad in Berks (2018)
Berkley Historic District
The Underground Railroad in the 19th Century (PSU)
Reading Eagle - Pine Forge (2022)
WHYY Forging a sense of Hopewell Furnace’s history through its citizens and visitors (2018)
NPS Website - African Americans at Hopewell
NPS - The African American Experience at Hopewell Furnace
The Mercury - Oldest African American cemetery in Berks County located at Hopewell Furnace (2014)
PHMC - Slavery and Underground Railroad Resources
VIGILANCE IN PENNSYLVANIA: UNDERGROUND RAILROAD ACTIVITIES IN THE KEYSTONE STATE, 1837-1861
RACC - The Underground Railroad in Berks County (Mildred Gilyard)
Isaac Cole, 32nd Regiment U.S.C.T. (Dickinson U Website