For some time now, the sound of the doorbell has been waking me up in the middle of the night.
At first I ignored it, I would stay in bed and pretend it did not ring.
Then some nights I went to the door and looked through the eye-hole and dismissed it because I was certain the landing was empty.
A few nights ago the doorbell rang again.
This time I rose, I unlocked the bedroom door, padded through the living room in the dark and unlocked the main door.
I could not see anyone.

Last night there was a knock on my bedroom door.