Related Clues:

• Toil
• Spartacus, for one
• Underground Railroad user
• ''Amistad'' extra
• Bondservant
• Amistad passenger
• Labor feverishly
• Toil too hard
• Dred Scott, once
• Emancipation Proclamation subject
• Toil away
• Freedman, once
• Spartacus was one
• Captive worker
• Ben-Hur, for a time