period. Freedom and memoir How Isaac gained his freedom is unknown. His memoir recounts that he left Albemarle County about four years before Jefferson's death, or around 1822. He met and talked to the French general, the Marquis de Lafayette, in Richmond in 1824. Twenty-first century research by the staff at Monticello discovered that Isaac Jefferson may have taken the name Isaac Granger in freedom, or used it before that in the slave community. Someone else may have later mistakenly assigned him the name of Jefferson. The 1840 census of Petersburg, Virginia includes a free black man, Isaac Granger, whose family members and age match what is known of Isaac Jefferson. In the early 1840s, Granger was working as a free man in Petersburg as a blacksmith, when he was interviewed by Charles Campbell, who published the account that year as the memoir of Isaac Jefferson. Granger did not say whether he took the surname Jefferson by choice or whether a white man imposed it, as was the case with his fellow Monticello slave Israel Jefferson. Thememoir was rediscovered and published again in 1951 by the historian Rayford Logan. In the interview, Granger recounted details about the relationship of Thomas Jefferson and the Hemings (or Hemmings) family. He said that "folks said that" Sally Hemings and at least some of her siblings "was old Mr. Wayles' children" in reference to Jefferson's father-in-law, John Wayles. Some scholars think that adds weight to other historic testimony that Sally Hemings and her five full siblings were half-siblings of the president's wife Martha Wayles Skelton Jefferson. The memoir describes the integral role which the Betty Hemings family played at Monticello as domestic servants, skilled artisans and craftsmen, and staff who ran the president's mansion. The fate of Isaac's wife Iris and their two sons is unknown. In 1840s, at the time of his memoir, Isaac was married to his second wife. Rev. Charles Campbell wrote that Isaac Jefferson died "a few years after these his recollections were taken down. He bore a good character." Campbell may have imposed the name Jefferson to attract more attention to his published memoir. Isaac Jefferson died in 1846. According to a document from August 20, 1846, "Isaac Jefferson having been dead more than three months & no person having applied for administration of his estate, it is ordered that the same be committed to J Branch Sergt. of