Shadrach Minkins was an African-American fugitive slave from Virginia who escaped in 1850 and reached Boston. He also used the pseudonyms Frederick Wilkins and Frederick Jenkins. He is known for being freed from a courtroom in Boston after being captured by United States marshals under the Fugitive Slave Act of 1850. Members of the Boston Vigilance Committee freed and hid him, helping him get to Canada via the Underground Railroad. Minkins settled in Montreal, where he raised a family. Two men were prosecuted in Boston for helping free him, but they were acquitted by the jury.

Richard Henry Dana Jr. was an American lawyer and politician from Massachusetts, a descendant of a colonial family, who gained renown as the author of the classic American memoir Two Years Before the Mast and as an attorney who successfully represented the U.S. government before the U.S. Supreme Court during the Civil War in the Prize Cases. Both as a writer and as a lawyer, he was a champion of the downtrodden, from seamen to fugitive slaves and freedmen.