next trip - Holy Cross

From  this, we found that Helen O'Grady is buried at Holy Cross in Brooklyn as well:

https://family-ogrady.blogspot.com/2021/08/helen-ogrady-daughter-of-martin-and.html

They have a search engine:

https://www.ccbklyn.org/locate-a-loved-one/

So why isn't Katherine Regan O'Grady buried with her daughter?

Because her sister is:

No idea if there's a stone, so we need to find out!

Also note, I've been adding some of the sites we visited to findagrave.com. For example:

https://www.findagrave.com/memorial/246765472/thomas-grady