Living in Woodstock, Windsor County, with 1791 census listing of three other free persons. I have not found him in any later census under the name Cato Boston or Christopher Malbone (various spellings).
The History of Woodstock, by Henry Swan Dana (1889), states that Cato was brought to Woodstock from Middleborough, MA, by Dr. Stephen Powers, who had purchased him as a boy in Middleborough. The Powers’ family came to Woodstock about 1774.
Folklore of Springfield [Vermont], by Mary Eva Baker (1922), mentions that Stephen Powers, a prominent lawyer, came to Woodstock, bringing with him his negro slave boy, Cato Boston, aged 13 years.
The History of Woodstock gives Cato Boston’s original name as either Christopher Molbone or Melbone, and also believes that he was in the War of 1812. A Christopher Mobbone, residence Hartland, enlisted in the Revolutionary War in Capt. Benjamin’s Company in 1781. Ancestry.com lists a Chrisn Mobbone as being a drummer. Christopher Malbone (“a Black Man”) was warned out of Rutland, 2 August 1803, Vermont Warnings Out, Vol. 2, by Alden Rollins (1997). I have not found information to show he was in the War of 1812.
While living in Woodstock, Cato Boston was charged with setting fire to the courthouse, but at the trial was found not guilty.
On 21 Sept. 1787, Cato Boston purchased 150 acres in Strafford, Orange County from Anthony Dick for £300. He quitclaimed this property to John Alger of Strafford for £30 on 7 March 1788. He signed his name.
Christopher Malbone, “a Blackman” was warned out of Berkshire, Franklin County, VT on 21 Oct. 1813. The summons was delivered to David R. Nutting, “a man with whom he lives.” Vermont Warnings Out, Vol. 1, by Alden Rollins (1995).