The skeletons had moved.
Not only had they moved. They had also made it very plain why they had left the cemetery. It was the new corpses, they wrote on a lifeless note hanging on the outer gates. The outer gates swing hither and dither, as ancient gates are wont to do, but the chilly winds did not seem to affect note. Some of the cold indifference of death was at work here.
Yet. Something had made the skeletons stir. The locals, who rarely visited the cemetery, busy as they were with their modern lives, were at a loss to explain what had happened, or how. After discussing at length, they decided to bring in outside help.
Outside help arrived, en masse. Journalists, those of supernatural inclination, academics, and utterly natural tourists all offered their opinions as to what had happened. It was aliens, werewolves, bad qi, crop circles on the other side of the ocean (somehow), sunspots, bone-eating bacteria – any number of speculations were tossed around in the hopes of finding an audience.
At length, the enthusiasm died off, to the punny satisfaction of news editors everywhere. When most of the tourists, supernaturally inclined and journalists had left, the academics dared to make educated guesses. A particular academic, a professor of cultural geography and human ecology, suggested that it was due to gentrification. The skeletons were of old stock, and had a very particular set of customs. They were dead set on these customs, too, and would rather resurrect and move to another place than adapt to the strange fancy ways of the newcomers.
As the professor expounded his theory, the locals nodded. That did indeed sound like the old folks they remembered from back in the days. They had been stubborn even in life, so why would they be anything else in the afterlife?