“The Monticello Jefferson-Hemings Report (2000) noted that Randolph made only four recorded visits to Monticello (in September 1802, September 1805, May 1808, and sometime in 1814); none is related to Sally Hemings’s conceptions.”
From records that exist.
Randolph never visited his brother before 1802?
Monticello was built by 1772.
So for 30 years, Randolph never came to Monticello to visit his older brother and the uncle of his own 6 kids?
(Notice Randolph had 6 kids—must have been potent)
Bad blood between them?
Regardless, from the source you cited:
“Since then, a committee commissioned by the Thomas Jefferson Heritage Society, after reviewing essentially the same material, reached different conclusions, namely that Sally Hemings was only a minor figure in Thomas Jefferson’s life and that it is very unlikely he fathered any of her children. This committee also suggested in its report, issued in April 2001 and revised in 2011, that Jefferson’s younger brother Randolph (1755-1815) was more likely the father of at least some of Sally Hemings’s children.”