Thank goodness, it’s mostly open field and not under structures. It’s hard to believe this could be overlooked so soon; 1940’s isn’t exactly ancient history. Shameful.
The 1940s were 80 years ago. The adults of that era who may have known about this, are all dead. Even the youngsters back then would have started dying off of old age by now, as well.
Documentation? Paperwork? Newspaper accounts? All buried in time or in boxes in the basement or at the back of old storage files somewhere
I mean, I run into young folks all the time who don't have a clue what happened 10 years ago, let alone 80+ years ago.
Things don't get passed on. Things get forgotten. Eventually, one day, no one knows anything about a graveyard under the school yard.
Not hard to see how this could happen or existed and no one alive today would know anything about it.