D.W. Griffith’s 1909 film holds the distinction of being the longest running horror movie on record. It's not really frightening though; it leans more toward tragedy, and stands out as one of the earliest “horror” movies to evoke some genuine emotion. This also demonstrates that there are filmmakers beyond George Melies. The plot is straightforward: a king has built a "Pleasure Room" for himself and his concubine.…