My Lusk family information came from Oma Stevens. She has postings, as do I, on the Hamilton Forum. Oma is descendanted from William L. Lusk (1849--aft 1892) and Emma Caledonia Parker (6-7-1857--2-16-1882).
William's mother Harreit P. Hamilton (1810--?)is the sister of my huband's ggg grandfather James F. Hamilton (1785--10-10-1848). He was her care-giver after their father died in 1818.
I'm guessing that the Zachary Lusk you have and the Zachary Lusk Oma and I have are the same person. But I will keep looking.