Instead of trying to figure out how to ask any of them to go traipsing around Lower Manhattan, I thought I’d try to figure out why the Book is sending us here, since the other locations have had historic significance. The map coordinates didn’t give any blatant answer, though the building it points to looks almost like it has a fraylily-type design to some of the blocks on the outside.
I found this: https://en.m.wikipedia.org/wiki/Charlton–King–Vandam_Historic_District
As far as that particular building, I think it may be this bit of the write-up:
Astor had the mansion moved from the top of the hill it stood on to the corner of Charlton and Varick, and the hill was levelled; the mansion was subsequently used as a theatre.
Edit: Got a better look at the street view on the computer, that particular building is the SE corner of Varick and Charlton, the one the coordinates point to is the NW corner.
But I did get a screenshot of the outside of the building’s fraylily-looking bits.
Edit #2: If we hadn’t heard anything back from Deeds, I would’ve suggested that perhaps the Google map views for inside the building (you can look around inside part of it!) as a potential source for answers.