Sarah Logan, dau. of David b. 18 May 1715 in Lurgan, Armagh, Ireland, married Samuel Briggs abt. 1764 in Lincoln Co., KY. Dau Jane Briggs m. Levi Todd 25 Feb 1779. Son Robert Smith Todd b. 25 Feb 1791, was the father of Mary Todd b. 13 Dec 1818 m. Abraham "Abe" Lincoln 4 Nov 1842. Line goes back to Adam De Logan b. 1264.