hundreds of slaves across the line to freedomledhundreds of slaves across the line to freedom
to the Underground Railroad's inclusion on the Network to Freedomledto the Underground Railroad's inclusion on the Network to Freedom
thousands of slaves during the Civil War north to freedomledthousands of slaves during the Civil War north to freedom
to a house located in School Streetmuch to his surprise leadsto a house located in School Street
in Robert 's areais ... discoveredin Robert 's area
slaves to freedomhelped leadslaves to freedom
many slavesledmany slaves
to freedom in the Northleadingto freedom in the North
the migration of slaves to free communities in the North before the Civil Warinfluencedthe migration of slaves to free communities in the North before the Civil War
towards the Underground Railroad's secretive and covert naturecontributedtowards the Underground Railroad's secretive and covert nature
slaves away from slave plantations and towards freedomledslaves away from slave plantations and towards freedom
to tens of thousands of slaves freedomleadto tens of thousands of slaves freedom
thousands of slavesledthousands of slaves
all the way to Canadaledall the way to Canada
all the way to Canadaledall the way to Canada
complex site constraints(passive) caused bycomplex site constraints
to freedomhelped leadto freedom
to freedomwere ledto freedom
to their freedomleadingto their freedom
her to freedomcan leadher to freedom
to freedomledto freedom
to freedomleadingto freedom
to transport fugitive slavesdesignedto transport fugitive slaves