I am trying to tie down my great-great-grandfather's parents. I am just using the census figures as I am not in NYC to go look up death records or birth records.
So looking at census records from 1880 I see Patrick and Sarah Nash, with an approximate birth date around 1854, maybe 1851.
I look at the 1860 census and I see a Patrick at 10y.o. parents Ann and Patrick 28 and 50 respectively. Brother, James is 4.
Skip ahead to 1870 and I see a Patrick as the Head of the household and 19. Then an Ann who is 50 and a John who is 14.
Do you think this could be the same family? Or should I wait till I get to NYC and look for death certificates since I notice that Patrick and Sarah are in the 1910, but not the 1920 census. How hard is it to look through a decade of death certificates in the Vital Records of NYC?