On Tuesday night, September 5, 1848, a group of 12 to 20 enslaved people fled from two slaveholders in Baltimore county, Maryland. Six were claimed by slaveholder J.T.H. Worthington. According to reports, the group succeeded in crossing into Pennsylvania, despite being pursued by white Marylanders.
Baltimore (MD) Sun, "A Slave Stampede," September 7, 1848; New York (NY) Herald, "Extensive Slave Stampede," September 8, 1848