Yesterday as I returned to my apartment I found the marble slab stuck to the roof of the entrance to the south balcony had crashed to the floor and broken into pieces．I knew this would happen sooner or later．I had ever to detach it from above after the marble slabs collapsed from the posts below．But then it seemed fixed steadily and unshakable．Nevertheless I had been worried about the possibility of its crash any time especially when I was scrubbing the floor or passing underneath．Now that it has fallen in my absence without causing any damage or start or casualties except for a few bruises on the floor，I felt quite relieved from the anxiety I've been in for so long．