Jack.... I found your (I believe) Nancy A. Delong in my file from John Baldwin who has researched DeLongs for years.Hope it helps, I have lineage on back if needed. Here is what he reports;
Ancestors of Nancy A. DeLong
Generation No. 1
1.Nancy A. DeLong, born Bet. 1836 - 1837 in Seneca Co., NY.She was the daughter of 2. William DeLong and 3. Almira/Elmira ??.She married (1) ? Denison.He died in (they res. Benton Post, MI).
Notes for Nancy A. DeLong: 1-7-5-4-1-1-2 NANCY A.b. Seneca Co., prob. l836-37.Under 5 in 1840, 13 in 1850; 22 in 1860 b. Seneca Co.; md. ____ Denison and resided Benton Post, Mich. (per an unnamed Seneca Co. historian)