For this haunt, I'm using Photofiltre, a free image editing tool available at http://photofiltre.free.fr/
. You can haunt any house, but the Mark Twain house is one of the creepiest and who better to haunt it than Twain himself. Begin by roughly outlining Twain with the Polygon tool. Right click on the outlined image and select Copy. Right click on the house image and select Paste. Right click on the pasted image and select Transform, Free. Using the available options, adjust the image size, position, and angle. Click Ok when your ghost is in the proper position. I put my ghost on the rooftop, but he'd look just as creepy peering out a window or strolling the grounds.