I slipped out of my room and made my way to The Denizen. Keeping my revolver handy, I made my way up to the floor on which Jason’s flat was situated. I hung a protection belt of garlic around my neck and the smell of it seemed to fill the corridor and give me assurance. It is a wonderful protection against the more usual Aeiirii forms of semi-materialization, by which I supposed the whistling might be produced. Though at that period of my investigation I was quite prepared to find it due to some perfectly natural cause, for it is astonishing the enormous number of cases that prove to have nothing abnormal in them. In addition to wearing the necklet, I had plugged my ears loosely with garlic and as I did not intend to stay more than a few minutes in the luxury apartment, I hoped to be safe. When I reached the door and put my hand into my pocket for the key, I had a sudden feeling of sickening funk. But I was not going to back out if I could help it.
I have been spending the last few weeks at The Denizen, a luxury apartment block built by Taylor Wimpey in Golden Lane, just inside the border between the City of London and Islington. I got an email about a month ago from a Mr. Jason Chan, who it seemed had bought an investment property in the building, and on staying in it for a few days while holidaying in London, found that he had purchased a very peculiar piece of real estate. His flat in The Denizen has got a most infernal whistling in it, sort of haunting it. The thing starts any time, you never know when, and it goes on until it frightens you. It's not ordinary whistling and it isn't the wind. Wait till you hear it.