A major purpose of this blog is to rescue strange - preferably very strange - stories which are in danger of being "lost" ie they can be found only in some obscure magazine or book, which is likely to be overlooked, so that when the second example occurs, nobody knows that there ever was a first example. The evidence would not accumulate. Therefore, I was a bit reticent about repeating something which was recorded in one of the all time great publications on poltergeistery. But what the heck! How many people read that publication anyway? Besides, I had forgotten about it myself until I reread the book after an absence of forty years.
It concerns a flat (apartment) with a very peculiar effect on people. I might add that, although the author - who was a very prominent psychic researcher of his day - described the phenomenon as a "poltergeist", there is not the slightest evidence to that effect, and no other poltergeist manifestations were present. Any reasonable explanation will be welcome.