Based on DNA and other evidence, they note the possibility that additional Jefferson males, including his brother Randolph Jefferson and any one of Randolph's four sons, or his cousin, could have fathered Eston Hemings or Sally Hemings's other children.[415] In 2002, historian Merrill Peterson said: "in the absence of direct documentary evidence either proving or refuting the allegation, nothing conclusive can be said about Jefferson's relations with Sally Hemings."[416] Concerning the 1998 DNA study Peterson said: "the results of the DNA testing of Jefferson and Hemings descendants provided support for the idea that Jefferson was the father of at least one of Sally Hemings's children."[416]
After Thomas Jefferson's death, although not formally manumitted, Sally Hemings was allowed by Jefferson's daughter Martha to live in Charlottesville as a free woman with her two sons until her death in 1835.[417][v] The Monticello Association refused to allow Sally Hemings' descendants the right of burial at Monticello.[419]

Interests and activities
Virginia State Capitol, designed by Jefferson (wings added later)
Jefferson was a farmer, obsessed with new crops, soil conditions, garden designs, and scientific agricultural techniques. 