You can see Slender Man in the background watching the children play. It seems a few of the children notice him standing there in the background. This was a promo photo taken in 1959 for the new City of Stirling Libraries in Australia. It was just recently uncovered a few years ago when Slender Man became popular. The photo was found in the Libraries archived database, but was never actually used as a public promo claims the photo leak source. Many people have called this picture a fake. Either way great picture, creepy stuff for sure.