Peter Woodland memorial (large monument)

In memory of Brother Peter Woodland,
who was killed at the disaster at the Hudson River tunnel, Wednesday, July 21, 1880

https://www.findagrave.com/memorial/206357729/peter-woodland

I think this deserves attention due to his role in this historical event: https://archive.hudsonreporter.com/2003/01/31/rise-and-fall-of-the-tubes-exhibit-explores-origin-of-path-tunnels/

This appears to be a memorial, not a grave. Behind a building (which also isn't mapped)