Your posting 2000 is old.Hope you are still checking GenForum.
I research York Co SC Logans; suspect William Logan - Jane Margaret Black may have been ancestors - no proof.My gggrandfather was Pvt. Robert Logan, CSA, bc 1821 d 1863 Civil War, Atlanta.He m. Mary Ann Moreland of York Dist. SC 1846 Gilmer Co GA; her father was Joseph Moreland, s/o John of York Dist.Can't prove Robert Logan's family.
Another William Logan of York Dist. m. Sarah Smarr, widow of Amos Black, dec'd, "late of Georgia."Amos Black's estate was co-administered c1818-19 by Sarah Black, widow, and Robert R. Smarr, her brother.William Logan and Robt. R. Smarr owned land together;Wm. Logan purchased land from RRS about 1828.Robert R. Smarr was single, with slaves, on 1830 York Dist. SC census.
There were Blacks in York Dist, sw NC, and many other places.Have not attempted census for Amos Black, "late of GA."