He wrote a detailed memoir about his experience.
Because chief justice Marshall declared that slaves were not people, but we're property and there for had no right to sue in any way shape or form. This called for the fugitive slave act, which out raged abolitionist.
The steam engine is one of them..
<span>Sometimes a lawsuit is filed so that a plaintiff can satisfy a very personal or profound sense of right and wrong, or to make an important point that impacts more than the parties in the case. It would be under the circumstance when both or one party is interested in settlement that it would be wise to settle out of court to avoid further conflicts.</span>
https://www.quora.com/What-gifted-musician-was-heavily-involved-in-the-1960s-Civil-Rights-Movement-with-Martin-Luther-King-and-Caeser-Chavez try this link, someone asked the question here