This story takes place when I was maybe 4 years old. I was raised by my paternal Grandmother, my Great Aunt, Bet and her daughter, Lena who was my grown cousin.
Growing up in that old cotton-mill house I didn't have a room of my own, but would take turns sleeping with the three adults. This happened one summer night when I was sleeping in my Cousin Lena's room which we also called the back room.
The rest of the house was in a square shape with four rooms that opened directly into each other with no hallway between. The back room was an extra, half-room that opened off the living room and was long and narrow. Apparently it had been added onto the house later. There was one big window to the left of the bed and beside it was a wardrobe.
This particular night was warm, so the window was up, but it had a screen on it. Lying there in the dim light of the street lamp, I heard a rustling sound outside the window. I looked and saw coming through the window... Right through the closed screen, the figure of a little black imp about 12 inches tall.
I could not make out any features because of the dim light, but I could plainly see the outline of a pointed hat on its head. This little figure climbed through the window, walked back and forth for a while on the floor at the foot of the bed, then disappeared right through the closed wardrobe door.
I never saw it again, but I saw plenty of other unusual things in that old house. I suspect that wardrobe might have been the site of some sort of portal. On another occasion, I walked into that room at night after my Cousin was already in bed, and saw what appeared to be the shadow of a moving skeleton on the wall above the headboard of the bed. That scared me pretty bad and I didn't want to sleep in that room anymore after that.