"That would make sense. I doubt very much if these remains were interred at the same place in London Above. More like this is where they've collected once they've been forgotten."

Or dug up wantonly for construction in times before anyone cared overly much about the bones being laid to rest.

"Is there something that can be done? Or should be done?"

...And is the sweating blood normal, because Ingress is getting a little worried.