February was Black History month. But the history of the African-American experience in Pennsylvania is too rich--and too important--to be confined to one month per year. So, this month, WPSU offers a special three-part series: An audio tour of some Pennsylvania stops on the Underground Railroad. Pennsylvania played an important role in the abolition movement. Quakers were at the forefront of the anti-slavery movement; our strong personal liberty laws protected fugitive slaves; and many towns were stops on the Underground Railroad. But before the 1820s there WERE some slaves in Pennsylvania. Not much is known about their lives, or their names. But to conclude our three part series that extends Black History Month beyond February, we remember them.