Assuming you are talking about the Horace Headley/Hadley who married Charlotte P. Wiley and lived in Alloway, Salem, NJ in 1860, along with wife Charlotte and children George S, Robert W, and Charles P, you might consider broadening your search to include Hadley vs Headley. That's how he appears in the 1860 census and his son George S. uses Hadley in 1900 and 1920.

A descendant of this person (surname Hadley) just joined the Hadley DNA Project (hadleydna.org). We hope to see his results in about 6-8 weeks from now (June 24).

Have you found anything on Horace's parents or siblings?