The Pearl incident was the largest recorded nonviolent escape attempt by enslaved people in United States history. On April 15, 1848, seventy-seven slaves attempted to escape Washington, D.C. by saili
This daguerreotype photograph shows Mary Edmonson (standing) and Emily Edmonson (seated), shortly after they were freed in 1848.
This 1848 poster was made by the District of Columbia government to warn alarmed white citizens fearing a slave revolt, not to riot or commit acts of violence. The poster was in response to public concern and rumors of a slave uprising, following the capture of the schooner Pearl