I didn't mean to imply that she was the only source of history, but rather the's only source of family accounts of that history.
I have numerous records now, but I still have some gaping holes.
My G-Grandfather Patrick Joseph Connell was last listed on my Grandfather's (John Joseph) birth Cert in 1911, the 1915 census shows my G-Grandmother Margaret (Divers) Connell as a Widow.
What's odd is my G-Grandfather's brother lived in the same building, and he apparently died in that same time period, within a few years, also leaving behind a wife and 5 kids.
I have scoured every record I can, from here, FamilySearch, the New York Times, and have yet to be able to find a date of death for my G-Grandfather Patrick Joseph Connell, or his brother Henry, or his father Martin, or his mother Mary (Keegan).
No dates of death, no causes, nothing.
It seems NYC is a black hole for genealogy. My Grandfather had a brother Martin Connell who was born in 1905, married a Margaret in 1920, and had 2 kids by the 1925 census, but that's all gleamed from a few census records.
I can't find birth info for him, or marriage info, or birth info for their children. I also don't know what became of him or his children, though my Grandfather's orbit implies he was still living in 1969, though my father never portrayed it that way.