Halloween is the time to watch horror films, but there are some old ones that you probably haven't yet seen, because they go back over a hundred years! Balladeer's Blog has a list of 31 silent horror films going back as far as Georges Melies' 1896 short film Le Manoir du Diable (The House of the Devil).
Unless an earlier example turns up this is the very first horror movie with a semblance of a story. This 3 minute film from THE Georges Melies features the Devil setting up housekeeping in a creepy mansion and conjuring up his infernal lackeys like witches, goblins and a living skeleton man to keep him company. Much as the early film world owes to Melies we all know if you’ve seen one of his flicks you’ve seen them all so this will be the last work by him that I cover for this list.