The Quock Walker case was a set of three Massachusetts court proceedings between 1781 and 1783, two civil suits and one criminal prosecution, in which the Supreme Judicial Court ruled that the state’s 1780 Constitution was incompatible with slavery. The decision made Massachusetts the first state in which the judiciary declared slavery unconstitutional, and by the 1790 federal census not a single enslaved person was recorded in the state.
Who Quock Walker Was
Walker was born into slavery around 1753. In 1754, his family was purchased by James Caldwell of Worcester County, who reportedly promised Walker his freedom at age twenty-five. Caldwell died, and his widow remarried Nathaniel Jennison, who took over the household and the people Caldwell had enslaved.
By 1781, Walker was twenty-eight and still held in bondage. He left Jennison’s property and went to work for Seth and John Caldwell, brothers of his former owner. Jennison tracked him down, seized him by force, and beat him with a stick. Three separate legal actions followed from that beating. Walker sued Jennison for battery. Jennison sued the Caldwell brothers for enticing away his “property.” And the state eventually indicted Jennison for criminal assault.
The Constitutional Hook
Massachusetts had ratified a new constitution in 1780, and its Declaration of Rights opened with language that would prove fatal to slavery. Article I declared that “All men are born free and equal, and have certain natural, essential, and unalienable rights; among which may be reckoned the right of enjoying and defending their lives and liberties.”1Mass.gov. Massachusetts Declaration of Rights – Article 1
The drafters may not have intended those words to abolish slavery outright. But the text carved out no exception for enslaved people, and that silence became the opening lawyers used to attack the institution in court.
The Three Proceedings
Walker v. Jennison (1781)
The first case was Walker’s own suit for damages from the beating. Heard at the Worcester Court of Common Pleas in June 1781, the jury found Walker to be “a Freeman and not the proper Negro slave” of Jennison and awarded him fifty pounds. He had asked for three hundred.
Jennison v. Caldwell (1781)
Running alongside Walker’s suit was Jennison’s own claim that the Caldwell brothers had unlawfully lured away his servant. Jennison won in the lower court and was awarded twenty-five pounds for the lost labor. The Caldwells appealed to the Supreme Judicial Court, which reversed, found them not guilty, and ordered Jennison to pay costs.2Library of Congress. The Abolition of Slavery in Massachusetts The state’s highest court was signaling that it would not treat Walker as someone else’s property.
Commonwealth v. Jennison (1783)
The final and most consequential case moved the dispute from private litigation into criminal law. In September 1781, a grand jury indicted Jennison for assault and battery against “Quack Walker,” charging that he “did beat, bruise, and evilly entreat” Walker with his fists and a large stick and imprisoned him for two hours “without warrant, just cause, or lawful authority.”2Library of Congress. The Abolition of Slavery in Massachusetts
The shift mattered. Jennison was now a defendant facing the Commonwealth itself, and his only real defense was that slavery gave him the legal right to discipline Walker by force. The case reached the Supreme Judicial Court and was tried before Chief Justice William Cushing in 1783.
Chief Justice Cushing’s Jury Instructions
Cushing’s charge to the jury went well beyond the facts of the assault. He acknowledged that slavery had been tolerated in the past under colonial law but noted that the practice had been “a usage” rooted in European colonial trade regulations and “nowhere is it expressly enacted or established.”
He then pointed to the 1780 Constitution and its declaration that all people are born free and equal. The constitution, he told the jury, “is totally repugnant to the idea of being born slaves,” and “there can be no such thing as perpetual servitude of a rational creature, unless his liberty is forfeited by some criminal conduct or given up by personal consent or contract.”3General Court of Massachusetts. Massachusetts Constitution If slavery was unconstitutional, Jennison had no authority over Walker, and the beating was simply assault.
The jury convicted. Jennison was sentenced to pay the Commonwealth forty shillings, cover the cost of prosecution, and remain imprisoned until those costs were paid. The fine was trivial. The principle was not.
How the Ruling Ended Slavery in Massachusetts
No legislature voted to abolish slavery in Massachusetts. What happened instead was more unusual: a judge told a jury that the state constitution, as written, already prohibited the practice, and the jury agreed. The ruling had no formal enforcement mechanism, no registration requirement, no emancipation proclamation. It worked through precedent and reputation. Slaveholders understood that a claim of ownership brought to court would fail. Enslaved people understood that an assertion of freedom would be backed by the bench.
The practical effect was sweeping. When the first federal census was taken in 1790, Massachusetts recorded zero enslaved persons.4Mass.gov. Massachusetts Constitution and the Abolition of Slavery The institution had evaporated in less than a decade. The judicial approach of using a state constitution’s liberty clause against slavery influenced similar efforts across New England, and by 1804 every New England state had abolished slavery, either through judicial ruling or gradual emancipation legislation.
Elizabeth Freeman’s Parallel Suit
Walker was not the only enslaved person testing the new constitution in 1781. In May of that year, Elizabeth Freeman, widely known as Mum Bett, filed suit in Berkshire County alongside a man named Brom against their enslaver, Colonel John Ashley. Their lawyer, Theodore Sedgwick, argued directly from the 1780 Constitution rather than relying on the technicalities that had characterized earlier freedom suits.
On August 22, 1781, a jury in Great Barrington declared Freeman and Brom free and awarded them thirty shillings each. Freeman’s case was the first successful freedom suit brought by an African American woman in Massachusetts, and it ran alongside the Walker proceedings as overlapping pressure on the courts from opposite ends of the state.
What Happened Afterward
Almost nothing is known about Walker’s life after he won his freedom. The historical record goes silent after the court proceedings, and the date and circumstances of his death are unknown.
William Cushing’s role in the case was not the end of his judicial career. On September 24, 1789, President George Washington nominated him as an Associate Justice of the newly created United States Supreme Court, making him one of the original members of that court.5Federal Judicial Center. Cushing, William He served until his death in 1810.
In 2022, Massachusetts formally recognized Walker’s legacy. Chapter 255 of the Acts of 2022 designates July 8 as Massachusetts Emancipation Day, also known as Quock Walker Day, and requires the governor to issue an annual proclamation marking the date “in recognition of the declaration of rights that rendered slavery unconstitutional in the Commonwealth.”6General Court of Massachusetts. Bill H.3117