"At a time subsequently I was still living back East, we were so many of us then Living Back East, and I was still living on the seventh floor of a seven-floor walk-up in Greenwich Village. [...] 'I understand that this used to be a House for Fallen Women,' F.D. once said to Calvin Knox. 'Yes,' said C. Knox, gloomily, 'and if you're not careful you're going to fall through the very same place in the floor, too. It quivers when my cat walks across it.'" (Avram Davidson, "Hark! Was That the Squeal of an Angry Thoat?" [1977])