If still you think me mad, you will think so no longer when I describe the wise precautions I took for the concealment of the body. The night waned, and I worked hastily, but in silence. 
I took up three planks from the flooring of the chamber, and deposited all between the scantlings. I then replaced the boards so cleverly so cunningly, that no human eye -- not even his -- could have detected anything wrong. There was nothing to wash out -- no stain of any kind -- no blood-spot whatever. I had been too wary for that. 
When I had made an end of these labours, it was four o'clock -- still dark as midnight. As the bell sounded the hour, there came a knocking at the street door. I went down to open it with a light heart, -- for what had I now to fear? There entered three men, who introduced themselves, with perfect suavity, as officers of the police. A shriek had been heard by a neighbour during the night; suspicion of foul play had been aroused; information had been lodged at the police office, and they (the officers) had been deputed to search the premises.