I have a copy of UPSHUR FAMILY IN VIRGINIA. It only lists Eloise Elam Upshur as thier child (1873 - 1942), who married Ira Williams and had no children.
Abel Parker Upshur II (b. May 1, 1843) was the son of Dr. Arthur Wilson Upshur (Feb. 8, 1817 - Sept. 2. 1844) and Esther Burton Parramore Bayly. Arthur was the brother of Abel P. Upshur I, the famous Secretary of the Navy and Secretary of State. Arthur's oldest brother was Littleton Upshur II, my g-g-g-grandfather.
I have more information going backwards, but nothing more on the children of A.P.Upshur II and Esther Bayly.