I, too, am curious about the Gallaghers in Forestport. I noticed several of them listed in the St Patrick's cemetery. My great-great grandmother was Sarah Anna Gallagher, born in 1823. She married James Shannon in Ireland and they arrived in US around 1845 and lived areas near Forrestport. Boonville, Lyonsdale, and Moose River, both Lewis and Oneida counties. I might guess the other Gallaghers are her siblings and maybe even parents.