I dunno, then that entire neighborhood is probably crawling with them. In Eastern Germany they didn't do restoration work till the 90's so there's entire rows of buildings just sort of propped up with tarps and stilts. If that went on in N. America they'd be in building code violation, it's amazing!
PS...a fun (or not so fun) story. Used to work in a building in Canada that had "history" and we heard knocking and stuff. Cree-peee. I've never been "haunted" since. Fortunately.
I don't think I have ever not lived in a place that didn't have some kind of activity going on. With dad being a 30 year veterian, we have move around a Lot. The latest thing that has happened to me was just a couple of months ago. How a artificial strand of ivy made it into my bedroom( door closed) and thrown down on my face while I was sleeping is beyound me. I don't even have ivy real, or not, that looks like that. This happened about 3 in the morning. I know, I jump out of the bed thinking a snake was in my bed, but nope, just the ivy. Strange.